Fait général: 12939 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 12939 is an unremarkable number.
Culture générale: 12939 is a boring number.
Date historique: June 4th is the day in 1965 that Duane Earl Pope robbed the Farmers' State Bank of Big Springs, Nebraska, killing three people execution style and severely wounding a fourth.