math_fact: 1587 is a number that does not have any digits in common with its cube.
trivia: 1587 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: May 5th is the day in 1809 that Mary Kies becomes the first woman awarded a U.S. patent, for a technique of weaving straw with silk and thread.