convert number to hrs and seconds

I have a number field in my Access table, field1. Field1 shows data as seconds.

Field1
3600

I want to convert this to hrs and second so it shows as
1 hr

How can I do this?

field1 / 60 / 60 = 1

VB Code:

msgbox timeserial(0,0,3600)

gives you 1:00:00 AM

even in WORD

VBA Code : format(<number>,"hh:nn:ss")