Mathematical fact: 7375 is a member of the Fibonacci-type sequence starting with 1 and 4.
Trivia: 7375 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: March 10th is the day in 1891 that Almon Strowger, an undertaker in Topeka, Kansas, patents the Strowger switch, a device which led to the automation of telephone circuit switching.