Islam is an Abrahamic, monotheistic religion centred primarily around the Quran, a religious text that is considered by Muslims to be the direct word of Allah as it was revealed to Muhammad, the main Islamic prophet . Islam Facts Followers of Islam are called Muslims . Muslims are monotheistic and worship one, all-knowing God, who in Arabic is known as Allah. Followers of Islam aim to live a life of complete submission to Allah. They believe that nothing can happen without Allah's permission, but humans have free will.