Fatto generale: 25140 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 25140 is an unremarkable number.
Trivia: 25140 is a boring number.
Data storica: October 29th is the day in 1967 that London criminal Jack McVitie is murdered by the Kray twins, leading to their eventual imprisonment and downfall.