Hecho matemático: 2974 is a value of n for which s(n) = s(n+1).
Trivia: 2974 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: February 21st is the day in 1245 that Thomas, the first known Bishop of Finland, is granted resignation after confessing to torture and forgery.