Ugly Number

An ugly number is a positive integer whose prime factors are limited to 2, 3, and 5.

Given an integer n, return true if n is an ugly number.

Example 1:

Input: n = 6
Output: true
Explanation: 6 = 2 × 3

Example 2:

Input: n = 1
Output: true
Explanation: 1 has no prime factors, therefore all of its prime factors are limited to 2, 3, and 5.

Example 3:

Input: n = 14
Output: false
Explanation: 14 is not ugly since it includes the prime factor 7.

Constraints:

• -231 <= n <= 231 - 1

SOLUTION:

class Solution: def isUgly(self, n: int) -> bool: if n == 0: return False while n % 2 == 0: n = n // 2 while n % 3 == 0: n = n // 3 while n % 5 == 0: n = n // 5 return n == 1