TypeScript any and number

any_number_coericion.js

// network_api.ts
class HttpPythonSiteObject {
  ...
}

function get_url_object(url: string): any {
  ...
  return new HttpPythonSiteObject();
}

// main.ts

...

let python_obj = get_url_object("https://www.python.org");
python_obj += 1; // What it the result ?? What it actually means to combine site object with number ??