1,639,027

13 × 126079

Starting at 1,639,027, the Collatz iteration reaches 1 after 145 steps. The first transition is 4917082; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 13 × 126079

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,765,120

Proper Divisor Sum 126,093

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #1639019 ← → #1639061

Radix Representation

Decimal	1639027
Binary	110010000001001110011 (21 bits)
Octal	0o6201163
Hexadecimal	0x190273

Divisor Catalog (4)

1 13 126,079 1,639,027

Collatz Trajectory (145 steps to reach 1)

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

1,639,027 4,917,082 2,458,541 7,375,624 3,687,812 1,843,906 921,953 2,765,860 1,382,930 691,465 2,074,396 1,037,198 518,599 1,555,798 777,899 2,333,698 1,166,849 3,500,548 1,750,274 875,137 2,625,412 1,312,706 656,353 1,969,060 984,530 492,265 1,476,796 738,398 369,199 1,107,598 553,799 1,661,398 830,699 2,492,098 1,246,049 3,738,148 1,869,074 934,537 2,803,612 1,401,806 700,903 2,102,710 1,051,355 3,154,066 1,577,033 4,731,100 2,365,550 1,182,775 3,548,326 1,774,163 5,322,490 2,661,245 7,983,736 3,991,868 1,995,934 997,967 2,993,902 1,496,951 4,490,854 2,245,427

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