Fait général: 1520 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1520 is the smaller number in a Ruth-Aaron pair.
Culture générale: 1520 is a boring number.
Date historique: February 28th is the day in 1922 that the United Kingdom ends its protectorate over Egypt through a Unilateral Declaration of Independence.