Fatto generale: 71253 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 71253 is a boring number.
Trivia: 71253 is a boring number.
Data storica: January 30th is the day in 1982 that Richard Skrenta writes the first PC virus code, which is 400 lines long and disguised as an Apple boot program called "Elk Cloner".