Fait général: 40537 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 40537 is an uninteresting number.
Culture générale: 40537 is an unremarkable number.
Date historique: December 26th is the day in 1966 that the first Kwanzaa is celebrated by Maulana Karenga, the chair of Black Studies at California State University, Long Beach.