Fatto generale: 42623 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 42623 is an uninteresting number.
Trivia: 42623 is an uninteresting number.
Data storica: September 11th is the day in 1941 that Charles Lindbergh's Des Moines Speech accusing the British, Jews and the Roosevelt administration of pressing for war with Germany.