Fait mathématique: 9185 is a value of n for which 2n and 7n together use each digit exactly once.
Culture générale: 9185 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: February 22nd is the day in 1972 that the Official Irish Republican Army detonates a car bomb at Aldershot barracks, killing seven and injuring nineteen others.