987,654 (nine hundred eighty-seven thousand, six hundred fifty-four).
You get the largest number if you sort the digits, from largest to smallest.
874321 is the largest number made from all these digits.
the largest 6 digit number is 999999 however following the rules provided, the largest number would be 789643.
111111. Since there are six digits, there must be a repeated digit, so why not repeat all ones to get the smallest one.
102345 is the smallest [positive] 6-digit number with no repeats.