Hecho general: 9481 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 9481 is a number whose sum of divisors is a 4^{th} power.
Trivia: 9481 is an unremarkable number.
Fecha histórica: December 15th is the day in 2001 that the Leaning Tower of Pisa reopens after 11 years and $27,000,000 to fortify it, without fixing its famous lean.