Fatto generale: 4485 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4485 is the number of 3×3 sliding puzzle positions that require exactly 16 moves to solve starting with the hole in a corner.
Trivia: 4485 is a boring number.
Data storica: April 11th is the day in 1987 that the London Agreement is secretly signed between Israeli Foreign Affairs Minister Shimon Peres and King Hussein of Jordan.