Fait général: 4136 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4136 is an uninteresting number.
Culture générale: 4136 is an uninteresting number.
Date historique: April 28th is the day in 1975 that General Cao Van Vien, chief of the South Vietnamese military, departs for the US as the North Vietnamese Army closed in on victory.