Hecho general: 11747 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 11747 is an uninteresting number.
Trivia: 11747 is an uninteresting number.
Fecha histórica: February 28th is the day in 1885 that the American Telephone and Telegraph Company is incorporated in New York State as the subsidiary of American Bell Telephone.