Fait mathématique: 5742 is a value of n for which 5n and 8n together use each digit exactly once.
Culture générale: 5742 is an unremarkable number.
Date historique: September 20th is the day in 1697 that the Treaty of Rijswijk is signed by France, England, Spain, the Holy Roman Empire and the Dutch Republic ending the Nine Years' War (1688–97).