Fatto generale: 12884 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 12884 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 12884 is an unremarkable number.
Data storica: April 10th is the day in 837 that Halley's Comet and Earth experienced their closest approach to one another when their separating distance equalled 0.0342 AU (3.2 million miles).