Your number, one digit away

One digit away

One change could reach Extreme.

Position 3: 7 → 1 · +401 points.

Gained: Triangular number, Digit sum 9, Descending segment, Double pair, Harshad number, 4 distinct digits, Happy number.

Lost: Digit sum 15, 5 distinct digits, Repeated digit.

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