Fatto matematico: 4740 is the trinomial coefficient T(10,3).
Trivia: 4740 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 22nd is the day in 1964 that the first test flight of the SR-71 (Blackbird) took place at Air Force Plant 42 in Palmdale, Calif.