Fatto matematico: 12785 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 12785 is a boring number.
Data storica: January 1st is the day in 414 that Galla Placidia, half-sister of Emperor Honorius, is married to the Visigothic king Ataulf at Narbonne.