Fait mathématique: 7225 is the number of ways to 17-color the faces of a tetrahedron.
Culture générale: 7225 is an uninteresting 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.