general_fact: 81250 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 81250 is a boring number.
trivia: 81250 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: June 15th is the day in 1752 that Benjamin Franklin proves that lightning is electricity (traditional date, the exact date is unknown).