General fact: 1017 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 1017 is the smallest number whose square contains 7 different digits.
Trivia: 1017 is a boring number.
Historical date: October 13th is the day in 1915 that the Battle for the Hohenzollern Redoubt marks the end of the Battle of Loos in northern France, World War I.