How to get full product url from ID Magento ?

$store = Mage::app()->getStore();

$product_id = "1"// change your product id here 

 $path = Mage::getResourceModel('core/url_rewrite')
    ->getRequestPathByIdPath('product/'.$product_id, $store);

$url = $store->getBaseUrl($store::URL_TYPE_WEB) . $path;