Numbers 16 begins:
Now Korah, the son of Izhar, the son of Kohath, the son of Levi, with Dathan and Abiram, the sons of Eliab, and On, the son of Peleth, sons of Reuben, took men;
They rebelled and lost. The Lord punished them (16:23-25):
And the Lord spoke to Moses, saying, 'Speak unto the congregation, saying: Get you up from about the dwelling of Korah, Dathan, and Abiram.' And Moses rose up and went unto Dathan and Abiram; and the elders of Israel followed him. [...]
Korach, Dathan, Abiram, their families, and 250 people total died. On the son of Peleth isn't mentioned by name after the first verse. What happened to him? Was he one of the 250 (but not named, unlike other two) or did he stop being part of the rebellion or something else?
(I am asking this question on behalf of someone who wishes to remain anonymous. Instead of just answering his email I chose to post it here in case it benefits others in the future.)