Fatto generale: 17915 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 17915 is an unremarkable number.
Trivia: 17915 is an unremarkable number.
Data storica: January 17th is the day in 1983 that the tallest department store in the world, Hudson's flagship store in downtown Detroit, closes due to high cost of operating.