Fait mathématique: 9541 is a value of n for which n and 8n together use each digit 1-9 exactly once.
Culture générale: 9541 is a boring number.
Date historique: February 13th is the day in 1935 that a jury in Flemington, New Jersey finds Bruno Hauptmann guilty of the 1932 kidnapping and murder of the Lindbergh baby, the son of Charles Lindbergh.