Fait général: 4247 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4247 is an uninteresting number.
Culture générale: 4247 is a boring number.
Date historique: August 17th is the day in 1959 that Quake Lake is formed by the magnitude 7.5 1959 Yellowstone earthquake near Hebgen Lake in Montana.