Hecho matemático: 75521 is an uninteresting number.
Trivia: 75521 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: October 8th is the day in 1895 that Eulmi incident- Queen Min of Joseon, the last empress of Korea, is assassinated and her corpse burnt by the Japanese in Gyeongbok Palace.