Hecho general: 91540 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 91540 is an unremarkable number.
Trivia: 91540 is an unremarkable number.
Fecha histórica: August 17th is the day in 1945 that Sukarno and Mohammad Hatta proclaim the independence of Indonesia, igniting the Indonesian National Revolution against the Dutch Empire.