Fait général: 5207 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 5207 is an unremarkable number.
Culture générale: 5207 is a boring number.
Date historique: April 3rd is the day in 1981 that the Osborne 1, the first successful portable computer, is unveiled at the West Coast Computer Faire in San Francisco.