Hecho general: 54039 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 54039 is an unremarkable number.
Trivia: 54039 is an uninteresting number.
Fecha histórica: December 14th is the day in 1963 that Baldwin Hills Reservoir wall bursts, killing five people and damaging hundreds of homes in Los Angeles.