Fait général: 1239 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1239 is a value of n for which n^{8}, n^{9}, n^{10}, and n^{11} have the same digit sum.
Culture générale: 1239 is a boring number.
Date historique: May 23rd is the day in 1873 that the Canadian Parliament establishes the North-West Mounted Police, the forerunner of the Royal Canadian Mounted Police.