9 Palindrome Number

Revert half of the number： Since we divided the number by 10, and multiplied the reversed number by 10, when the original number is less than the reversed number, it means we've processed half of the number digits.

class Solution(object):
    def isPalindrome(self, x):
        """
        :type x: int
        :rtype: bool
        """
        if x < 0 or (x % 10 == 0 and x != 0):
            return False
        revertVal = 0
        while(x > revertVal):
            revertVal = revertVal * 10 + x % 10
            x /= 10
        return x == revertVal or x == revertVal/10