3 × 5² × 8581

Prime Factor Structure

Factorization String 3 × 5^2 × 8581

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 1,064,168

Proper Divisor Sum 420,593

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #643567 ← → #643583

1 3 5 15 25 75 8,581 25,743 42,905 128,715 214,525 643,575

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

643,575 1,930,726 965,363 2,896,090 1,448,045 4,344,136 2,172,068 1,086,034 543,017 1,629,052 814,526 407,263 1,221,790 610,895 1,832,686 916,343 2,749,030 1,374,515 4,123,546 2,061,773 6,185,320 3,092,660 1,546,330 773,165 2,319,496 1,159,748 579,874 289,937 869,812 434,906 217,453 652,360 326,180 163,090 81,545 244,636 122,318 61,159 183,478 91,739 275,218 137,609 412,828 206,414 103,207 309,622 154,811 464,434 232,217 696,652 348,326 174,163 522,490 261,245 783,736 391,868 195,934 97,967 293,902 146,951

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.