Fait général: 81498 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 81498 is a boring number.
Culture générale: 81498 is an unremarkable number.
Date historique: February 18th is the day in 1932 that the Empire of Japan declares Manzhouguo (the obsolete Chinese name for Manchuria) independent from the Republic of China.