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.

Source: Prime Curios!