Mathematical fact: 6526 is the smallest number whose 10^{th} power contains exactly the same digits as another 10^{th} power.
Trivia: 6526 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: November 12th is the day in 1990 that Crown Prince Akihito is formally installed as Emperor Akihito of Japan, becoming the 125th Japanese monarch.