"A million and one."
Translation:Milliún is a haon.
The NEID explicitly lists milliún is a haon as an example of counting.
This isn't necessarily the answer to "843726 + 156275", "a million and one" is a common phrase, as in "I can think of a million and one reasons why I shouldn't have to answer this question", or in a number of different song titles.
As a native English speaker, I have heard (and said) "millions" and "a thousand and one" (as well as "a million and one") to convey "to many to count." As is so often the case with languages, there are many ways to express this concept! (And, I agree with JoAnnCross about your English!)