Fait général: 1569 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1569 is the number of labeled mappings from 5 points to themselves with exactly 1 cycles.
Culture générale: 1569 is an unremarkable number.
Date historique: April 17th is the day in 2006 that Sami Hammad, a Palestinian suicide bomber, detonates an explosive device in Tel Aviv, killing 11 people and injuring 70.