general_fact: 42807 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 42807 is an uninteresting number.
trivia: 42807 is an unremarkable number.
historical_date: March 14th is the day in 1942 that Orvan Hess and John Bumstead became the first in the world to successfully treat a patient, Anne Miller, using penicillin.