Hecho general: 81429 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 81429 is an uninteresting number.
Trivia: 81429 is an uninteresting number.
Fecha histórica: December 11th is the day in 1282 that Llywelyn the Last, the last native Prince of Wales, is killed at Cilmeri, near Builth Wells, south Wales.