Numbers 1470-1499

A page of the Numeropedia - the Special Encyclopedia of Numbers

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1,471

[Math.]  A prime number.

1,472

[Math.]

23×64 = 1,472 = 32×46

23×96 = 2,208 = 32×69

64×69 = 4,416 = 96×46.

[Math.]  The number of prime numbers of the form 4n+1 less than 26,861 equals the number of prime numbers of the form 4n+3 less than 26,861: 1472.

1,476

[Math.]  9,949,716 = 2583×3852 = 1476×6741.

1,477

[Tech.]  The Dual Tone Multi-Frequency (DTMF) Keypad

 Frequency 1209 Hz 1336 Hz 1477 Hz 1633 Hz 697 Hz 1 2 3 A 770 Hz 4 5 6 B 852 Hz 7 8 9 C 941 Hz * 0 # D

1,481

[Math.]  A prime number.

1,483

[Math.]  A prime number.

1,485

[Math.]  A triangular number (sum of all integers from 1 to 54): 1485 = 1+2+…+53+54.

1,487

[Math.]  A prime number.

1,489

[Math.]  A prime number.

[Math.]  2×3×5×67×1489 = 2,992,890, the smallest such number, using each of 9 digits 1-9 once.

1,492

[History]  The year Christopher Columbus discovered New World.

[Math.]  Professor Umbugio’s famous “The End of the World” formula: the number 1492n–1770n–1863n+2141n is divisible by 1946, for all values of n up to 1945, where 1492, 1770, 1863 are the year of the Discovery of the New World by Christopher Columbus, the Boston Massacre and the Gettysburg Address, respectively.  (E. Starke, Professor Umbugio’s prediction, American Mathematical Monthly, 54, January 1947.)

[Movie]  Name of TV show/series or movie: “1492: Conquest of Paradise”.

1,493

[Math.]  A prime number.

1,496

[Math.]  A pyramidal number (sum of all squares of integers from 1 to 16): 1496 = 12+22+…+152+162.

1,499

[Math.]  A prime number.

1,440-1,469 (separate page)

1,470-1,499 (separate page)