Fait général: 1529 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1529 is the number of (not necessarily distinct) sets of Egyptian fractions that sum to 1 with smallest fraction 1/22.
Culture générale: 1529 is an uninteresting number.
Date historique: March 8th is the day in 1722 that the Safavid Empire of Iran is defeated by an army from Afghanistan at The Battle of Gulnabad, pushing Iran into anarchy.