This function convert integer like 1000000 into 1M, 1K, etc

nFormatter.js

function nFormatter(num, digits) {
    var si = [
      { value: 1, symbol: "" },
      { value: 1E3, symbol: "K" },
      { value: 1E6, symbol: "M" },
      { value: 1E9, symbol: "G" },
      { value: 1E12, symbol: "T" },
      { value: 1E15, symbol: "P" },
      { value: 1E18, symbol: "E" }
    ];
    var rx = /\.0+$|(\.[0-9]*[1-9])0+$/;
    var i;
    // for negative value is work
    for (i = si.length - 1; i > 0; i--) {
      if (Math.abs(num) >= si[i].value) {
        break;
      }
    }
    return (num / si[i].value).toFixed(digits).replace(rx, "$1") + si[i].symbol;
}

1000