1,966,558

2 × 11 × 71 × 1259

Starting at 1,966,558, the Collatz iteration reaches 1 after 122 steps. The first transition is 983279; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2 × 11 × 71 × 1259

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 3,265,920

Proper Divisor Sum 1,299,362

Digit Sum / Digital Root 40 (Root: 4)

Adjacent Primes #1966511 ← → #1966561

Radix Representation

Decimal	1966558
Binary	111100000000111011110 (21 bits)
Octal	0o7400736
Hexadecimal	0x1E01DE

Divisor Catalog (16)

1 2 11 22 71 142 781 1,259 1,562 2,518 13,849 27,698 89,389 178,778 983,279 1,966,558

Collatz Trajectory (122 steps to reach 1)

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

1,966,558 983,279 2,949,838 1,474,919 4,424,758 2,212,379 6,637,138 3,318,569 9,955,708 4,977,854 2,488,927 7,466,782 3,733,391 11,200,174 5,600,087 16,800,262 8,400,131 25,200,394 12,600,197 37,800,592 18,900,296 9,450,148 4,725,074 2,362,537 7,087,612 3,543,806 1,771,903 5,315,710 2,657,855 7,973,566 3,986,783 11,960,350 5,980,175 17,940,526 8,970,263 26,910,790 13,455,395 40,366,186 20,183,093 60,549,280 30,274,640 15,137,320 7,568,660 3,784,330 1,892,165 5,676,496 2,838,248 1,419,124 709,562 354,781 1,064,344 532,172 266,086 133,043 399,130 199,565 598,696 299,348 149,674 74,837

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