Fatto matematico: 8459 is a value of n so that n(n+4) is a palindrome.
Trivia: 8459 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 27th is the day in 425 that the University of Constantinople is founded by Emperor Theodosius II at the urging of his wife Aelia Eudocia.