Fait général: 42017 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 42017 is an unremarkable number.
Culture générale: 42017 is a boring number.
Date historique: January 14th is the day in 1343 that Arnošt of Pardubice becomes the last bishop of Prague and, subsequently, the first Archbishop of Prague.