Fait général: 1725 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1725 is a structured deltoidal hexacontahedral number.
Culture générale: 1725 is an unremarkable number.
Date historique: September 20th is the day in 2011 that the United States ends its "Don't Ask, Don't Tell" policy, allowing gay men and women to serve openly for the first time.