Fatto generale: 1582 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1582 is a value of n so that n(n+4) is a palindrome.
Trivia: 1582 is an uninteresting number.
Data storica: April 30th is the day in 1900 that Casey Jones dies in a train wreck in Vaughn, Mississippi, while trying to make up time on the Cannonball Express.