Fatto matematico: 4972 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 4972 is an uninteresting number.
Data storica: August 11th is the day in 1920 that the Latvian–Soviet Peace Treaty, which relinquished Russia's authority and pretenses to Latvia, is signed, ending the Latvian War of Independence.