861,817

11 × 78347

Starting at 861,817, the Collatz iteration reaches 1 after 206 steps. The first transition is 2585452; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 11 × 78347

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 940,176

Proper Divisor Sum 78,359

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #861803 ← → #861823

Radix Representation

Decimal	861817
Binary	11010010011001111001 (20 bits)
Octal	0o3223171
Hexadecimal	0xD2679

Divisor Catalog (4)

1 11 78,347 861,817

Collatz Trajectory (206 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

861,817 2,585,452 1,292,726 646,363 1,939,090 969,545 2,908,636 1,454,318 727,159 2,181,478 1,090,739 3,272,218 1,636,109 4,908,328 2,454,164 1,227,082 613,541 1,840,624 920,312 460,156 230,078 115,039 345,118 172,559 517,678 258,839 776,518 388,259 1,164,778 582,389 1,747,168 873,584 436,792 218,396 109,198 54,599 163,798 81,899 245,698 122,849 368,548 184,274 92,137 276,412 138,206 69,103 207,310 103,655 310,966 155,483 466,450 233,225 699,676 349,838 174,919 524,758 262,379 787,138 393,569 1,180,708

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