1517

1517 = 37 x 41 (the product of two consecutive prime numbers).

1517 has two representations as a sum of two squares: 1517 = 19² + 34² = 26² + 29².

1517 is the hypotenuse of two primitive Pythagorean triples: 1517² = 165² + 1508² = 795² + 1292².

The sum of the decimal digits of 2¹⁵¹⁷ is also a power of 2.

1517 divides the sum of the first 1517 Fibonacci numbers.

1517 was the record-breaking attendance at MAA’s MathFest 2009 in Portland, Ore.


Italian mathematician and Franciscan friar Luca Pacioli died in the year 1517.

Source: Wikipedia