Adam Clarke on 1 Kings 11:42

Solomon reigned - forty years - Josephus says fourscore years, which is sufficiently absurd. Calmet supposes him to have been eighteen years old when he came to the throne, and that he died A.M. 3029, aged fifty-eight years; and, when we consider the excess in which he lived, and the criminal passions which he must have indulged among his thousand wives, and their idolatrous and impure worship, this life was as long as could be reasonably expected.