Hecho matemático: 417 is the smallest number so that it and the next 3 numbers have different numbers of distinct prime factors.
Trivia: 417 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: February 20th is the day in 1988 that the Nagorno-Karabakh Autonomous Oblast votes to secede from Azerbaijan and join Armenia, triggering the Nagorno-Karabakh War.