How to check if the current page’s parent is one of 2 different ID’s

Add following function into your functions.php file:

function is_child_of() { 
    global $post; 
    return is_page() && in_array( $post->post_parent, func_get_args() );
}

And use it in your template like this:

if ( is_child_of( 5860, 1047 ) ) {
    // is child of 5860 or 1047
}