Fait général: 1712 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1712 is the number of regions the complex plane is cut into by drawing lines between all pairs of 16^{th} roots of unity.
Culture générale: 1712 is an unremarkable number.
Date historique: September 7th is the day in 1893 that the Genoa Cricket & Athletic Club, to become one of the oldest Italian football clubs, is established by British expats.