Fatto generale: 1142 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1142 is the number of ways to place a non-attacking white and black pawn on a 7×7 chessboard.
Trivia: 1142 is a boring number.
Data storica: February 15th is the day in 1991 that the Visegrád Agreement, establishing cooperation to move toward free-market systems, is signed by the leaders of Czechoslovakia, Hungary and Poland.