3,720,956

2² × 73 × 12743

3,720,956 has digital root 5. The neighboring primes are 3720947 and 3720989; its proper-divisor sum differs from the starting integer by -840,520.

Prime Factor Structure

Factorization String 2^2 × 73 × 12743

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 12

Divisor Sum (σ) 6,601,392

Proper Divisor Sum 2,880,436

Digit Sum / Digital Root 32 (Root: 5)

Adjacent Primes #3720947 ← → #3720989

1 2 4 73 146 292 12,743 25,486 50,972 930,239 1,860,478 3,720,956

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

3,720,956 1,860,478 930,239 2,790,718 1,395,359 4,186,078 2,093,039 6,279,118 3,139,559 9,418,678 4,709,339 14,128,018 7,064,009 21,192,028 10,596,014 5,298,007 15,894,022 7,947,011 23,841,034 11,920,517 35,761,552 17,880,776 8,940,388 4,470,194 2,235,097 6,705,292 3,352,646 1,676,323 5,028,970 2,514,485 7,543,456 3,771,728 1,885,864 942,932 471,466 235,733 707,200 353,600 176,800 88,400 44,200 22,100 11,050 5,525 16,576 8,288 4,144 2,072 1,036 518 259 778 389 1,168 584 292 146 73 220 110