Hecho matemático: 5242 is the number of ways to place 8 non-attacking kings on a 8×8 chessboard so that there is a king in every row and column.
Trivia: 5242 is an uninteresting number.
Fecha histórica: May 8th is the day in 1924 that the Klaipėda Convention is signed formally incorporating Klaipėda Region (Memel Territory) into Lithuania.