Fatto generale: 5277 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5277 is an unremarkable number.
Trivia: 5277 is an unremarkable number.
Data storica: June 12th is the day in 1665 that England installs a municipal government in New York City (the former Dutch settlement of New Amsterdam).