Fatto generale: 7621 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 7621 is an unremarkable number.
Trivia: 7621 is an uninteresting number.
Data storica: November 11th is the day in 1887 that Anarchist Haymarket Martyrs August Spies, Albert Parsons, Adolph Fischer and George Engel are executed.