821,665

5 × 13 × 12641

Prime Factor Structure

Factorization String 5 × 13 × 12641

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 8

Divisor Sum (σ) 1,061,928

Proper Divisor Sum 240,263

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #821663 ← → #821677

1 5 13 65 12,641 63,205 164,333 821,665

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

821,665 2,464,996 1,232,498 616,249 1,848,748 924,374 462,187 1,386,562 693,281 2,079,844 1,039,922 519,961 1,559,884 779,942 389,971 1,169,914 584,957 1,754,872 877,436 438,718 219,359 658,078 329,039 987,118 493,559 1,480,678 740,339 2,221,018 1,110,509 3,331,528 1,665,764 832,882 416,441 1,249,324 624,662 312,331 936,994 468,497 1,405,492 702,746 351,373 1,054,120 527,060 263,530 131,765 395,296 197,648 98,824 49,412 24,706 12,353 37,060 18,530 9,265 27,796 13,898 6,949 20,848 10,424 5,212

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