Fait général: 21425 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21425 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 21425 is an unremarkable number.
Date historique: August 28th is the day in 1955 that Black teenager Emmett Till is murdered in Mississippi, galvanizing the nascent American Civil Rights Movement.