general_fact: 2401 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 2401 is the 4^{th} power of the sum of its digits.
trivia: 2401 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: July 28th is the day in 2010 that Airblue Flight 202 crashes into the Margalla Hills north of Islamabad, Pakistan, killing all 152 people aboard.