1,372,770

2 × 3² × 5 × 7 × 2179

1,372,770 has digital root 9. The neighboring primes are 1372759 and 1372771; its proper-divisor sum differs from the starting integer by 1,335,420.

Prime Factor Structure

Factorization String 2 × 3^2 × 5 × 7 × 2179

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Total Divisors 48

Divisor Sum (σ) 4,080,960

Proper Divisor Sum 2,708,190

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #1372759 ← → #1372771

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

1,372,770 686,385 2,059,156 1,029,578 514,789 1,544,368 772,184 386,092 193,046 96,523 289,570 144,785 434,356 217,178 108,589 325,768 162,884 81,442 40,721 122,164 61,082 30,541 91,624 45,812 22,906 11,453 34,360 17,180 8,590 4,295 12,886 6,443 19,330 9,665 28,996 14,498 7,249 21,748 10,874 5,437 16,312 8,156 4,078 2,039 6,118 3,059 9,178 4,589 13,768 6,884 3,442 1,721 5,164 2,582 1,291 3,874 1,937 5,812 2,906 1,453