Fait général: 1571 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1571 is the smallest number that can not be formed using the digit 1 at most 23 times, together with the symbols +, –, × and ÷.
Culture générale: 1571 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: April 19th is the day in 1782 that John Adams secures the Dutch Republic's recognition of the United States as an independent government.