|
1000 (one thousand) is the natural number following 999 and preceding 1001.
In mathematics In time In popular culture Trivia To count to one thousand, counting one number every second continuously would take 16 minutes and 40 seconds. 1001-1249 '''1001''' - sphenic number (7 x 11 x 13), pentagonal number, pentatope number 1002 - sphenic number, Mertens function zero, abundant number 1003 - semiprime (17 × 59) 1005 - Mertens function zero 1008 - divisible by the number of primes below it 1009 - first prime above 1000 1010 - Mertens function zero 1013 - Sophie Germain prime, centered square number, Mertens function zero 1014 - Mertens function zero 1015 - square pyramidal number 1018 - Mertens function zero 1019 - Sophie Germain prime, safe prime 1020 - polydivisible number 1023 - is the highest number one can count to on one's fingers using binary 1024 - power of two, 32^2; in common use, the amount of bytes in a kilobyte (in 1999, the IEC coined kibibyte to use for 1024 with kilobyte being 1000, but this convention has not been widely adopted) 1027 - sum of the squares of the first eight primes 1028 - sum of totient function for first 58 integers 1031 - Sophie Germain prime 1035 - triangular number, hexagonal number 1049 - Sophie Germain prime, highly cototient number 1051 - centered pentagonal number 1056 - pronic number 1060 - sum of the first 25 primes 1071 - heptagonal number 1072 - centered heptagonal number 1079 - every positive integer is the sum of at most 1079 tenth powers. 1080 - pentagonal number 1081 - triangular number, member of Padovan sequence 1086 - Smith number, sum of totient function for first 59 integers 1087 - Chen prime, cousin prime, lucky prime, Kynea number 1089 - 33^2, nonagonal number, centered octagonal number 1091 - cousin prime and twin prime 1092- divisible by the number of primes below it 1093 - twin prime and star number 1102 - sum of totient function for first 60 integers 1103 - Sophie Germain prime, balanced prime 1104 - Keith number 1105 - Carmichael number, magic constant of n × n magic square and n-Queens Problem for n = 13, decagonal number, centered square number 1116 - divisible by the number of primes below it 1122 - pronic number, divisible by the number of primes below it 1123 - balanced prime 1124 - Leyland number 1128 - triangular number, hexagonal number, divisible by the number of primes below it 1134- divisible by the number of primes below it 1138 - special code for Easter eggs on Star Wars DVDs, because of George Lucas's movie THX 1138 1140 - tetrahedral number 1152 - highly totient number 1156 - 34^2, octahedral number, centered pentagonal number 1161 - sum of the first 26 primes 1162 - pentagonal number, sum of totient function for first 61 integers 1169 - highly cototient number 1170 - highest possible score in an NAQT match 1176 - triangular number 1177 - heptagonal number 1184 - amicable number with 1210 1187 - safe prime, Stern prime, balanced prime 1190 - pronic number 1192 - sum of totient function for first 62 integers 1198 - centered heptagonal number 1200 - the number of households the Nielsen ratings sample 1201 - centered square number 1210 - amicable number with 1184 1216 - nonagonal number 1219 - Mertens function zero 1220 - Mertens function zero 1223 - Sophie Germain prime, balanced prime 1225 - triangular number, 35^2, triangular square number, hexagonal number, centered octagonal number 1228 - sum of totient function for first 63 integers 1229 - Sophie Germain prime 1233 - 12^2 + 33^2 1240 - square pyramidal number 1241 - centered cube number 1242 - decagonal number 1247 - pentagonal number 1250-1499 1255 - Mertens function zero 1256 - Mertens function zero 1258 - Mertens function zero 1259 - highly cototient number 1260 - highly composite number, pronic number, vampire number, sum of totient function for first 64 integers 1261 - star number, Mertens function zero 1264 - sum of the first 27 primes 1266 - centered pentagonal number, Mertens function zero 1270 - Mertens function zero 1279 - Mertens function zero 1280 - Mertens function zero 1282 - Mertens function zero 1283 - safe prime 1285 - Mertens function zero 1288 - heptagonal number 1289 - Sophie Germain prime, Mertens function zero 1291 - Mertens function zero 1292 - Mertens function zero 1296 - 36^2, fourth power of 6, sum of the cubes of the first eight positive integers, the number of rectangles on a normal 8x8 chessboard 1297 - Mertens function zero 1299 - Mertens function zero 1300 - Mertens function zero, largest possible win margin in an NAQT match 1301 - centered square number 1302 - Mertens function zero 1306 - Mertens function zero 1307 - safe prime 1308 - sum of totient function for first 65 integers 1318 - Mertens function zero 1319 - safe prime 1325 - Markov number 1326 - triangular number, hexagonal number, Mertens function zero 1328 - sum of totient function for first 66 integers 1329 - Mertens function zero 1330 - tetrahedral number, forms a Ruth-Aaron pair with 1331 under second definition 1331 - cube of 11, centered heptagonal number, forms a Ruth-Aaron pair with 1330 under second definition 1332 - pronic number 1335 - pentagonal number, Mertens function zero 1336 - Mertens function zero 1337 - Used in the novel form of spelling called leet 1338 - Mertens function zero 1342 - Mertens function zero 1350 - nonagonal number 1365 - pentatope number 1367 - safe prime, balanced prime 1369 - 37^2, centered octagonal number 1371 - sum of the first 28 primes 1378 - triangular number 1379 - magic constant of n × n magic square and n-Queens Problem for n = 14. 1381 - centered pentagonal number 1387 - super-Poulet number, decagonal number 1394 - sum of totient function for first 67 integers 1395 - vampire number 1404 - heptagonal number 1405 = 26^2 + 27^2 = 7^2 + 8^2 + ... + 16^2, centered square number 1406 - pronic number, semi-meandric number 1409 - Sophie Germain prime 1419 - Zeisel number 1425 - self-descriptive number in base 5 1426 - sum of totient function for first 68 integers 1426 - pentagonal number 1430 - Catalan number 1431 - triangular number, hexagonal number 1432 - member of Padovan sequence 1435 - vampire number; the standard railway gauge in millimetres, equivalent to 4' 8½" 1439 - Sophie Germain prime, safe prime 1440 - a highly totient number and a 481-gonal number. Also, the number of minutes in one day, and the blocksize of a standard 3,5" floppy disk 1441 - star number 1444 - 38^2, smallest pandigital number in Roman numerals 1451 - Sophie Germain prime 1469 - octahedral number, highly cototient number 1470 - pentagonal pyramidal number, sum of totient function for first 69 integers 1471 - centered heptagonal number 1480 - sum of the first 29 primes 1481 - Sophie Germain prime 1482 - pronic number 1485 - triangular number 1487 - safe prime 1490 - tetranacci number 1491 - nonagonal number, Mertens function zero 1492 - Mertens function zero 1493 - Stern prime 1494 - sum of totient function for first 70 integers 1496 - square pyramidal number 1499 - Sophie Germain prime 1500-1749 1501 - centered pentagonal number 1511 - Sophie Germain prime, balanced prime 1513 - centered square number 1518 - Mertens function zero 1519 - Mertens function zero 1520 - pentagonal number, Mertens function zero, forms a Ruth-Aaron pair with 1521 under second definition 1521 - Mertens function zero, 39^2, centered octagonal number, forms a Ruth-Aaron pair with 1520 under second definition 1523 - Mertens function zero, safe prime 1524 - Mertens function zero 1525 - heptagonal number, Mertens function zero 1527 - Mertens function zero 1528 - Mertens function zero 1530 - vampire number 1531 - Mertens function zero 1532 - Mertens function zero 1535 - Thabit number 1537 - Keith number, Mertens function zero 1540 - triangular number, hexagonal number, decagonal number, tetrahedral number 1543 - Mertens function zero 1544 - Mertens function zero 1546 - Mertens function zero 1556 - sum of the squares of the first nine primes 1559 - Sophie Germain prime 1560 - pronic number 1564 - sum of totient function for first 71 integers 1575 - odd abundant number 1583 - Sophie Germain prime 1588 - sum of totient function for first 72 integers 1593 - sum of the first 30 primes 1596 - triangular number 1597 - Fibonacci number, Markov number,Prime Number,emirp 1600 - 40^2, street number on Pennsylvania avenue of the White House, perfect score on SAT 1601 - Sophie Germain prime, the novel 1601 (Mark Twain) 1616 - the year Shakespeare died 1617 - pentagonal number 1618 - centered heptagonal number 1619 - safe prime 1625 - centered square number 1626 - centered pentagonal number 1633 - star number 1638 - harmonic divisor number 1639 - nonagonal number 1640 - pronic number 1649 - highly cototient number, Leyland number 1651 - heptagonal number 1653 - triangular number, hexagonal number 1657 - cuban prime 1660 - sum of totient function for first 73 integers 1666 - largest efficient pandigital number in Roman numerals (each symbol occurs exactly once) 1679 - highly cototient number 1680 - highly composite number 1681 - 41^2, smallest number yielded by the formula n^2 + n + 41 that is not a prime; centered octagonal number 1682 - member of a Ruth-Aaron pair (first definition) 1683 - member of a Ruth-Aaron pair (first definition) 1695 - magic constant of n × n magic square and n-Queens Problem for n = 15. 1696 - sum of totient function for first 74 integers 1701 - decagonal number, hull number of the Starship Enterprise on Star Trek 1705 - tribonacci number 1711 - triangular number 1717 - pentagonal number 1720 - sum of the first 31 primes 1722 - Giuga number, pronic number 1728 - the quantity expressed as 1000 in duodecimal, that is, the cube of twelve (called a great gross), and so, the number of cubic inches in a cubic foot 1729 - taxicab number, Carmichael number, Zeisel number, centered cube number. In the decimal expansion of e the first time all 10 digits appear in sequence starts at the 1729th decimal place. In 1979 the rock musical Hair closed on Broadway in New York City after 1729 performances. 1733 - Sophie Germain prime 1736 - sum of totient function for first 75 integers 1741 - centered square number 1747 - balanced prime 1750-1999 1753 - balanced prime 1756 - centered pentagonal number 1764 - 42^2 1770 - triangular number, hexagonal number, Town of Seventeen Seventy in Australia 1771 - tetrahedral number 1772 - centered heptagonal number, sum of totient function for first 76 integers 1782 - heptagonal number 1785 - square pyramidal number 1791 - largest natural number that cannot be expressed as a sum of at most four hexagonal numbers. 1794 - nonagonal number 1800 - pentagonal pyramidal number, also, in da Ponte's Don Giovanni, the number of women Don Giovanni had slept with so far when confronted by Donna Elvira, according to Leporello's tally 1801 - cuban prime 1806 - pronic number, product of first four terms of Sylvester's sequence, primary pseudoperfect number 1807 - fifth term of Sylvester's sequence 1811 - Sophie Germain prime 1820 - pentagonal number, pentatope number 1823 - safe prime 1827 - vampire number 1828 - meandric number, open meandric number 1830 - triangular number 1832 - sum of totient function for first 77 integers 1834 - octahedral number, sum of the cubes of the first five primes 1836 - factor by which a proton is more massive than an electron 1837 - star number 1841 - Mertens function zero 1843 - Mertens function zero 1844 - Mertens function zero 1845 - Mertens function zero 1849 - 43^2, centered octagonal number 1851 - sum of the first 32 primes 1853 - Mertens function zero 1854 - Mertens function zero 1856 - sum of totient function for first 78 integers 1857 - Mertens function zero 1861 - centered square number, Mertens function zero 1862 - Mertens function zero, forms a Ruth-Aaron pair with 1863 under second definition 1863 - Mertens function zero, forms a Ruth-Aaron pair with 1862 under second definition 1864 - Mertens function zero 1866 - Mertens function zero 1870 - decagonal number 1885 - Zeisel number 1889 - Sophie Germain prime, highly cototient number 1891 - triangular number, hexagonal number, centered pentagonal number 1892 - pronic number 1897 - member of Padovan sequence 1900 - 1900 or Novecento is a 1977 movie 1901 - Sophie Germain prime 1907 - safe prime, balanced prime 1918 - heptagonal number 1926 - pentagonal number 1929 - Mertens function zero 1931 - Sophie Germain prime 1933 - centered heptagonal number 1934 - sum of totient function for first 79 integers 1936 - 44^2 1938 - Mertens function zero 1951 - cuban prime 1953 - triangular number 1956 - nonagonal number 1966 - sum of totient function for first 80 integers 1969 - the movie 1969 (film) 1973 - Sophie Germain prime 1980 - pronic number 1984 - 11111000000 in binary also see 1984 (disambiguation) 1985 - centered square number 1988 - sum of the first 33 primes Reference television programming, viewers, and who's really in controlLanham, MD: Rowman & Littlefield, 2005 | ||||||||
|
| |||||||||
 |
|
| |