Fatto generale: 7124 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 7124 is an unremarkable number.
Trivia: 7124 is an unremarkable number.
Data storica: July 3rd is the day in 2001 that a Vladivostok Avia Tupolev Tu-154 jetliner crashes on approach to landing at Irkutsk, Russia killing 145 people.