can a ceiling fan support a 145 pound person?

Not normally, depends on how well it is build and or installed.

Quite possibly, my daughter (who is a cop) recently had to attend a suicide of a woman who hung herself from a ceiling fan, they were surprised that it had held her weight.

... What are you doing that requires knowing this?

Unlikely. But, a ceiling fan for factories will be more likely because they are strong.

Just lol.

Not a chance.

No