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Ugly Number
An ugly number is a positive integer which does not have a prime factor other than 2, 3, and 5.
An ugly number is a positive integer which does not have a prime factor other than 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.
Example 3
Input: n = 14
Output: false
Explanation: 14 is not ugly since it includes the prime factor 7.
Constraints
- -231 <= n <= 231 - 1
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