general_fact: 7186 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 7186 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 7186 is an uninteresting number.
historical_date: September 3rd is the day in 1874 that the congress of the state of México elevates Naucalpan to the category of Villa, with the title of "Villa de Juárez".