Fait général: 4147 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4147 is a value of n for which f(n) = f(reverse(n)).
Culture générale: 4147 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: May 9th is the day in 1671 that Thomas Blood, disguised as a clergyman, attempts to steal England's Crown Jewels from the Tower of London.