// prints 8
Debug.Log(Mathf.NextPowerOfTwo(7));

// prints 256
Debug.Log(Mathf.NextPowerOfTwo(139));

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Awake() {
Debug.Log(Mathf.NextPowerOfTwo(7));
Debug.Log(Mathf.NextPowerOfTwo(139));
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Awake():
Debug.Log(Mathf.NextPowerOfTwo(7))
Debug.Log(Mathf.NextPowerOfTwo(139))