Fait mathématique: 1536 is not the sum of 4 non-zero squares.
Culture générale: 1536 is an uninteresting number.
Date historique: March 15th is the day in 1514 that Jodocus Badius Ascensius publishes Christiern Pedersen's Latin version of Saxo’s Gesta Danorum, the oldest known version of that work.