Fait général: 84172 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 84172 is an uninteresting number.
Culture générale: 84172 is an unremarkable number.
Date historique: June 15th is the day in 1985 that Rembrandt's painting Danaë is attacked by a man (later judged insane) who throws sulfuric acid on the canvas and cuts it twice with a knife.