How to change the formatting of a number in a text object

[#1]

I apologise if this is very basic, but I'm new to QV.

I have a text object which has a number in it eg. 123456, by using =sum(April population 2011) . I want to be able to show it as 123,456. How do I do this?

Thank you in advance!

[#2 · Accepted solution]

NUM(sum(April population 2011),'#,##0')

[#3]

Thank you for the speedy response!