Fait général: 15939 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 15939 is a boring number.
Culture générale: 15939 is a boring number.
Date historique: August 21st is the day in 1986 that Carbon dioxide gas erupts from volcanic Lake Nyos in Cameroon, killing up to 1,800 people within a 20-kilometer range.