Fait général: 1147 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1147 is the product of two consecutive primes.
Culture générale: 1147 is an uninteresting number.
Date historique: February 20th is the day in 1988 that the Nagorno-Karabakh Autonomous Oblast votes to secede from Azerbaijan and join Armenia, triggering the Nagorno-Karabakh War.