Fatto generale: 41586 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 41586 is an unremarkable number.
Trivia: 41586 is a boring number.
Data storica: November 9th is the day in 1720 that the synagogue of Yehudah he-Hasid is burned down by Arab creditors, leading to the expulsion of the Ashkenazim from Jerusalem.