Fatto generale: 1443 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1443 is a number n for which the sum of the first n composite numbers is a palindrome.
Trivia: 1443 is a boring number.
Data storica: December 13th is the day in 1636 that the Massachusetts Bay Colony organizes three militia regiments to defend the colony against the Pequot Indians.