Fatto generale: 25823 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 25823 is a boring number.
Trivia: 25823 is an unremarkable number.
Data storica: September 12th is the day in 1229 that the Aragonese army under the command of James I of Aragon disembarks at Santa Ponça, Majorca, with the purpose of conquering the island.