There are two answers to that question.First answer:The number 1 appears one time in the numeric representation of 1,000,000.Second answer:There are one million "ones" if you are asking what quantity of "ones" (1's) that it takes to make 1 million.
Exactly 30 million of them can.
4.2 million is equal to 4,200,000.
Exactly forty seven million of them.
The riddle answer: One