642,142

2 × 41² × 191

Prime Factor Structure

Factorization String 2 × 41^2 × 191

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 12

Divisor Sum (σ) 992,448

Proper Divisor Sum 350,306

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #642133 ← → #642149

1 2 41 82 191 382 1,681 3,362 7,831 15,662 321,071 642,142

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

642,142 321,071 963,214 481,607 1,444,822 722,411 2,167,234 1,083,617 3,250,852 1,625,426 812,713 2,438,140 1,219,070 609,535 1,828,606 914,303 2,742,910 1,371,455 4,114,366 2,057,183 6,171,550 3,085,775 9,257,326 4,628,663 13,885,990 6,942,995 20,828,986 10,414,493 31,243,480 15,621,740 7,810,870 3,905,435 11,716,306 5,858,153 17,574,460 8,787,230 4,393,615 13,180,846 6,590,423 19,771,270 9,885,635 29,656,906 14,828,453 44,485,360 22,242,680 11,121,340 5,560,670 2,780,335 8,341,006 4,170,503 12,511,510 6,255,755 18,767,266 9,383,633 28,150,900 14,075,450 7,037,725 21,113,176 10,556,588 5,278,294

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