Fait mathématique: 5291 is a value of n for which n(n+1) is a palindrome.
Culture générale: 5291 is an uninteresting number.
Date historique: June 26th is the day in 1718 that Tsarevich Alexei Petrovich of Russia, Peter the Great's son, mysteriously dies after being sentenced to death by his father for plotting against him.