Fatto matematico: 64456 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 64456 is an unremarkable number.
Data storica: June 21st is the day in 1877 that the Molly Maguires, ten Irish immigrants convicted of murder, are hanged at the Schuylkill County and Carbon County, Pennsylvania prisons.