Midpoint of 1,000,000-1,199,999?

You have defined a range consisting of 200,000 numbers so the midpoint will have 100,000 numbers above and 100,000 numbers below. 1,000,000 + 99,999 = 1,099,999 and 199,999 - 99,999 = 1,100,000 so the mid point has to between those: 1,099,999.5

That means the midpoint is not a whole number within the defined range. The range has to be an odd number for the midpoint to be a whole number