Hecho general: 9158 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 9158 is a value of n for which n and 8n together use each digit 1-9 exactly once.
Trivia: 9158 is an unremarkable number.
Fecha histórica: January 26th is the day in 1911 that Richard Strauss' opera Der Rosenkavalier receives its debut performance at the Dresden State Opera.