Fait général: 4224 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 4224 is a palindrome that is one less than a square.
Culture générale: 4224 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: July 25th is the day in 1797 that Horatio Nelson loses more than 300 men and his right arm during the failed conquest attempt of Tenerife (Spain).