Fatto generale: 8520 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 8520 is an unremarkable number.
Trivia: 8520 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 29th is the day in 1965 that Pakistan's Space and Upper Atmosphere Research Commission (SUPARCO) successfully launches its seventh rocket in its Rehber series.