Hecho general: 71870 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 71870 is an uninteresting number.
Trivia: 71870 is an uninteresting number.
Fecha histórica: October 9th is the day in 1986 that the musical The Phantom of the Opera has its first performance at Her Majesty's Theatre in London.