Puzzles/Non-scientific puzzles/Less than Two Million/Solution

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Puzzles | Non-scientific puzzles | Less than Two Million | Solution

"n is an integer that is less than 2000000."

"n is an integer that is either negative, 0, has fewer than 7 digits, or has 7 digits and its first digit is 1."

"n/2 < 1 000 000 |n being an integer (and similars equations)."