265

265 = 5 x 53.

2, 6, and 5 are the sixth, seventh, and eighth decimal digits of pi.

265 has two representations as a sum of two squares: 265 = 3² + 16² = 11² + 12².

265 is the hypotenuse of two primitive Pythagorean triples: 265² = 23² + 264² = 96² + 247².

265 is a centered square number.

Greek mathematician Archimedes, who is studying in Alexandria in the year 265 BC, devised a screw for raising water

Source: Wikipedia