Mathematical fact: 85257 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 85257 is an uninteresting number.
Historical date: 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.