Fait mathématique: 1345 is the number of permutations of 8 elements that have 5^{th} power equal to the identity permutation.
Culture générale: 1345 is an uninteresting number.
Date historique: September 6th is the day in 1492 that Christopher Columbus sails from La Gomera in the Canary Islands, his final port of call before crossing the Atlantic for the first time.