Fatto generale: 10239 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 10239 is an unremarkable number.
Trivia: 10239 is an unremarkable number.
Data storica: January 12th is the day in 2010 that the 2010 Haiti earthquake occurs killing an estimated 316,000 and destroying the majority of the capital Port-au-Prince.