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.
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!