Your number, one digit away

One digit away

One change could reach Extreme.

Position 6: 0 → 1 · +257 points.

Gained: Perfect square, Digit sum 10, Descending segment.

Lost: Digit sum 9, Harshad number, Happy number.

53 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.