Hecho matemático: 1251 is an uninteresting number.
Trivia: 1251 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: June 4th is the day in 1989 that Ali Khamenei is elected the new Supreme Leader of Islamic republic of Iran by the Assembly of Experts after the death of Ayatollah Ruhollah Khomeini.