Fatto generale: 12549 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 12549 is a boring number.
Trivia: 12549 is an unremarkable number.
Data storica: May 10th is the day in 1503 that Christopher Columbus visits the Cayman Islands and names them Las Tortugas after the numerous turtles there.