Well over a million - but except for a very few areas, the Israelis and Arabs live in separate areas. Note, however, that contrary to lots of propaganda, the Arab birthrate in this area is lower than the Jewish one - mainly because the Jews who settle in Judea and Samaria tend to be far more observant, and to thus have many children.
So the Arab areas of Judea and Samaria could be craved out of the present “West Bank” and given back to Jordan, and the remaining Cis-Jordanian lands would be overwhelmingly Jewish?
Do that, and hand Gaza back to Egypt, and there’s no need for a “Palestinian State.”