Fait mathématique: 7956 is a value of n for which n and 4n together use each digit 1-9 exactly once.
Culture générale: 7956 is a boring number.
Date historique: October 12th is the day in 2005 that the second Chinese human spaceflight Shenzhou 6 launched carrying Fèi Jùnlóng and Niè Hǎishèng for five days in orbit.