Fait mathématique: 81174 is an uninteresting number.
Culture générale: 81174 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: March 31st is the day in 1965 that an Iberia Airlines Convair 440 crashes into the sea on approach to Tangier, killing 47 of 51 occupants.