481

481 = 13 x 37.

481 has two representations as a sum of two squares: 481 = 9² + 20² = 15² + 16².

481 is the hypotenuse of two primitive Pythagorean triples: 481² = 31² + 480² = 319² + 360².

481 is an octagonal number.

The Great Pyramid of Giza in Egypt is 481 feet high.

Source: WolframAlpha