Fatto generale: 4150 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4150 is 4^{5} + 1^{5} + 5^{5} + 0^{5}.
Trivia: 4150 is an unremarkable number.
Data storica: May 12th is the day in 1264 that the Battle of Lewes, between King Henry III of England and the rebel Simon de Montfort, 6th Earl of Leicester, begins.