General fact: 612 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 612 is a number whose square and cube use different digits.
Trivia: 612 is an unremarkable number.
Historical date: September 3rd is the day in 1874 that the congress of the state of México elevates Naucalpan to the category of Villa, with the title of "Villa de Juárez".