Numbers /9,870
How rare is 9,870?
9,870 scores 577 and sits in the Extreme tier — 1 in 786 of all supported numbers score this high or higher. Everything below is computed from a complete analysis of all 1,000,001 numbers in range.
RNGdle.net’s own rarity score. Top 0.13% means that proportion of supported numbers scores at least this high. Every exact number has the same chance of being rolled. Same-length rank keeps the score and compares only numbers with 4 digits, including ties. How this differs from EP · Badge guide
These notes make the number easy to read, but they add no score unless a separately counted rarity signal appears below.
A sum 1 + 2 + … + k for some k.
Factorization · signal frequency
One of 9,000 four-digit numbers in range.
Range · signal frequency
Contains a run of three or more consecutive descending digits.
Sequence · signal frequency
This number's digits add up to an uncommon total.
Arithmetic · signal frequency
Digits strictly alternate between odd and even.
Sequence · signal frequency
This number uses an uncommon count of distinct digits.
Repetition · signal frequency
Strongest signal: Triangular number. It appears in 1,414 supported numbers and contributes +189 after correlation decay.
Why is 9,870 unusual? Only 0.13% of the 1,000,001 supported numbers receive an equal or higher rarity score. This number falls in the Extreme tier. Scoring is grounded in the exact frequency of each detected trait — rarer traits carry more information and contribute more to the score.
Algorithm version 1.1.0
One digit away
One change could reach Singular.
Your number
9,870
Extreme · Top 0.13%
Position 4: 0 → 6 · +34 points.
Gained: Sequential descending, Digit sum 30, Happy number.
35 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.
Explore & share this near miss →Similar interesting numbers
Explore a shared pattern, a comparable score, or a mathematical relationship. Every link explains its connection to 9,870.
Shared patterns
Same length, nearby scores
Patterns in this number
Each of these has its own page explaining how common the pattern is and why.
Descending Digit Runs
Three or more digits each one lower than the last, appearing anywhere in the number — the 543 inside 15432, for instance.
Alternating Odd and Even Digits
Odd, even, odd, even — or the reverse — all the way through, as in 385274 or 1614. The digits themselves are free; only their parity is constrained.
Triangular Numbers
A triangular number counts the dots in a triangle: 1, 3, 6, 10, 15, 21 — each one the running total 1 + 2 + … + k.