Was prophet Mohamed illegitimate

Answer 1

It depends who you ask and what you are asking.

Is Mohammed illegitimate in the sense that he was born out of wedlock?

No. No person ascribes to Mohammed any illegitimate birth and most people regardless of their views of him consider him the proper child of his parents.

Is Mohammed's Prophecy actual prophecy?

Only Muslims and religions derived from Islam such as the Druze and Baha'i faiths, recognize Mohammed's prophecy as being God-given or of being binding on humanity. Christians, Jews, Hindus, Buddhists, Zoroastrians, Daoists, etc. do not affirm Mohammed's prophecy or divine relationship. (In many cases, his claim to prophecy is irrelevant to them in the same way that Ancient Greek claim that Athena loved Athens is irrelevant to most Muslims.)

Judaism does mention that Islam is an extension of God's prophecy to make the entire world monotheistic, but says nothing as to whether Mohammed actually had prophecy.

For more information on Mohammed, please refer to question below.