Fatto generale: 25409 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 25409 is a boring number.
Trivia: 25409 is an unremarkable number.
Data storica: July 25th is the day in 1693 that Ignacio de Maya founds the Real Santiago de las Sabinas, now known as Sabinas Hidalgo, Nuevo León, México.