Fatto matematico: 29570 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 29570 is an unremarkable number.
Data storica: December 15th is the day in 1256 that Hulagu Khan captures and destroys the Hashshashin stronghold at Alamut in present-day Iran as part of the Mongol offensive on Islamic southwest Asia.