Hecho matemático: 52757 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 52757 is an unremarkable number.
Fecha histórica: June 10th is the day in 1786 that a landslide dam on the Dadu River created by an earthquake ten days earlier collapses, killing 100,000 in the Sichuan province of China.