Fatto generale: 15742 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15742 is an unremarkable number.
Trivia: 15742 is an unremarkable number.
Data storica: February 5th is the day in 1917 that the Congress of the United States passes the Immigration Act of 1917 over President Woodrow Wilson's veto.