Fait mathématique: 15252 is an unremarkable number.
Culture générale: 15252 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 3rd is the day in 1908 that the Pravda newspaper is founded by Leon Trotsky, Adolph Joffe, Matvey Skobelev and other Russian exiles in Vienna.