Fait mathématique: 4150 is 4^{5} + 1^{5} + 5^{5} + 0^{5}.
Culture générale: 4150 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: May 12th is the day in 1191 that Richard I of England marries Berengaria of Navarre who is crowned Queen consort of England the same day.