Fatto matematico: 1451 is the 5^{th} central heptanomial coefficient.
Trivia: 1451 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 21st is the day in 1907 that the Chilean Army commits a massacre of at least 2,000 striking saltpeter miners in in Iquique, Chile.