Fait général: 1541 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1541 is a value of n for which f(n) = f(n-1) + f(n-2).
Culture générale: 1541 is an uninteresting number.
Date historique: March 20th is the day in 1913 that Sung Chiao-jen, a founder of the Chinese Nationalist Party, is wounded in an assassination attempt and dies 2 days later.