Your number, one digit away
One digit away
One change could reach Extreme.
Your number
510,501
Rare · Top 7.49%
Position 1: 5 → 2 · +120 points.
Gained: Digit sum 9, Descending segment, Alternating parity, Harshad number, 4 distinct digits, Happy number.
Lost: Digit sum 12, 3 distinct digits, Semiprime.
53 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.