Hecho general: 64251 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 64251 is a boring number.
Trivia: 64251 is an unremarkable number.
Fecha histórica: November 29th is the day in 1944 that the first surgery (on a human) to correct blue baby syndrome is performed by Alfred Blalock and Vivien Thomas.