Friday, April 15, 2011

457

457 is a prime number.

457 has a representation as a sum of two squares: 457 = 42 + 212.

457 is the hypotenuse of a primitive Pythagorean triple: 4572 = 1682 + 4252.

457 is a divisor of 1812 - 1.

457 is the index of a prime Euclid number.

457 is the sum of three consecutive primes: 457 = 149 + 151 + 157.

The German submarine known as U-457 was sunk in the Barents Sea by depth charges from the British destroyer HMS Impulsive during World War II.

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