Define the symmetric of an integer as the integer obtained by inverting the order of its digits, eg 4321 is the symmetric of 1234. What are the numbers for which the square is equal to the symmetric of the square of the symmetric?

symmetric.js

function symmetric(number) {
  return parseInt((''+number).split('').reverse().join(''));
}

var i = 0;
while (true) {

  if ((""+symmetric(i)).length === (""+i).length) {
    if (symmetric(i*i) === (symmetric(Math.pow(symmetric(i), 2)))) 
      console.log(i)  
  }

  i++
}