What kind of noun is himself?

The Word 'himself' is not a noun.

The Word 'himself' is a pronoun, a reflexive pronoun, a Word that takes the place of a noun for a male that 'reflects back' to its antecedent.

Example: Father makes himself a sandwich before leaving for work. (the pronoun 'himself' takes the place of the noun 'father' as the indirect object of the verb)