How to add comma to separate numbers - JavaScript

Question

I am trying to print an number in JavaScript with commas as separators. but when i add comma it will give me Nan value For example, I want to show the number 170607 as "170,607". How would I go about doing this?

 

HTML :

<div class="row about-stats stats block-1-4 block-m-1-2 block-mob-full" data-aos="fade-up">
    <div class="col-block stats__col ">
        <div class="stats__count">4</div>
   </div>
    <div class="col-block stats__col">
        <div class="stats__count">40</div>
    </div>
    <div class="col-block stats__col">
        <div class="stats__count">170607</div>
    </div>
    <div class="col-block stats__col">
        <div class="stats__count">3447</div>
    </div>
</div>

Script:

/* Stat Counter
 * ------------------------------------------------------ */
 var clStatCount = function() {
     var statSection = $(".about-stats"),
         stats = $(".stats__count");
     statSection.waypoint({
         handler: function(direction) {
             if (direction === "down") {
                 stats.each(function () {
                     var $this = $(this);
                     $({ Counter: 0 }).animate({ Counter: $this.text() }, {
                         duration: 4000,
                         easing: 'swing',
                         step: function (curValue) {
                             $this.text(Math.ceil(curValue));
                         }
                     });
                 });
             }
             // trigger once only
             this.destroy();
         },
         offset: "90%"
     });
 };