Hecho general: 86561 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 86561 is an unremarkable number.
Trivia: 86561 is an uninteresting number.
Fecha histórica: December 29th is the day in 1835 that the Treaty of New Echota is signed, ceding all the lands of the Cherokee east of the Mississippi River to the United States.