He is bored. :)
Cats are predominately night creatures. Oh, they will learn the household habits, and adjust, but yours is a young cat. We live with 4 cats, and I have two who prefer to roam the house all night. Which is fine until something goes "crash" at 3 in the morning. LOL
Some ideas for your kitty:
Try engaging him in active playtime before bedtime - literally, try and wear him out, so he is too tired to stay up.
Get him a scratching post, and, as another poster said, "train" him to use it. Seed it with catnip if you have to.
Try a kennel (like one used for smalls dogs) but big enough to put a small litter pan in one end and food/water the other end, for him to hang out in at night. Blankets and toys, also. Just like a dog, if you begin feeding him in there, with the door open, during the day, he may come to accept it as "his place" and spend the night in it. Put in the apartment farthest away from the bedrooms. P.S. The laundry room became his place.
Where does your other cat sleep at night? If the other one sleeps in a bedroom behind a closed a door, you may want to try having it out with this cat.
Be patient, keep correcting it, they eventually get it.
Good Luck
God Bless