570

570 = 2 x 3 x 5 x 19.

570 is the product of the only four prime Roman numeral palindromes: 570 = II x III x V x XIX.

570 is a triangular matchstick number, 3n(n + 1)/2 for n = 19.

570 is the perimeter of a Pythagorean triple: 570 = 95 + 228 + 247 and 247² = 95² + 228².

Muhammad, founder of the Islamic religion, was born in the year 570 in the city of Mecca.

Source: Number Gossip