Fatto matematico: 9237 is a value of n for which n and 5n together use each digit 1-9 exactly once.
Trivia: 9237 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 15th is the day in 1958 that Walter O'Malley's Los Angeles Dodgers host the first Major League Baseball game played on the West Coast of the United States.