Fatto matematico: 1413 is the smallest number that can not be formed using the digits 0-7 at most once, together with the symbols + – × and ÷.
Trivia: 1413 is an unremarkable number.
Data storica: November 13th is the day in 1956 that the United States Supreme Court declares Alabama laws requiring segregated buses illegal, thus ending the Montgomery Bus Boycott.