Fatto generale: 1223 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1223 is the smallest number with complexity 24.
Trivia: 1223 is a boring number.
Data storica: May 7th is the day in 1846 that the Cambridge Chronicle, America's oldest surviving weekly newspaper, is published for the first time in Cambridge, Massachusetts.