The number given to the character "Jean Valjean" in the musical "Les Misérables". It has no meaning in the Novel written by Victor Hugo, but was a random number selected to rhyme with the rest of the musical. It is now a term to describe those who are punished extensively for a small crime and it is best used when randomly breaking out into song.
My name is Jean Valjean! twofoursixohoneeeeeeeeeeee!(24601)
In addition to Jean Valjean's prison number, it is also the prison number assigned to the Simpsons' character "Sideshow Bob" in the episode Black Widower a letter addressed to him is addressed to 24601
Dear No. 24601,
I need a man and cannot find one among the law abiding.