// prints false
Debug.Log(Mathf.IsPowerOfTwo(7));

// prints true
Debug.Log(Mathf.IsPowerOfTwo(32));

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Example() {
        Debug.Log(Mathf.IsPowerOfTwo(7));
        Debug.Log(Mathf.IsPowerOfTwo(32));
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Example():
        Debug.Log(Mathf.IsPowerOfTwo(7))
        Debug.Log(Mathf.IsPowerOfTwo(32))