Mathematical fact: 2872 is the 15^{th} Tetranacci number.
Trivia: 2872 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: November 11th is the day in 1865 that Treaty of Sinchula is signed by which Bhutan cedes the areas east of the Teesta River to the British East India Company.