1,566,538

2 × 783269

Starting at 1,566,538, the Collatz iteration reaches 1 after 75 steps. The first transition is 783269; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 783269

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 2,349,810

Proper Divisor Sum 783,272

Digit Sum / Digital Root 34 (Root: 7)

Adjacent Primes #1566529 ← → #1566559

Radix Representation

Decimal	1566538
Binary	101111110011101001010 (21 bits)
Octal	0o5763512
Hexadecimal	0x17E74A

Divisor Catalog (4)

1 2 783,269 1,566,538

Collatz Trajectory (75 steps to reach 1)

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

1,566,538 783,269 2,349,808 1,174,904 587,452 293,726 146,863 440,590 220,295 660,886 330,443 991,330 495,665 1,486,996 743,498 371,749 1,115,248 557,624 278,812 139,406 69,703 209,110 104,555 313,666 156,833 470,500 235,250 117,625 352,876 176,438 88,219 264,658 132,329 396,988 198,494 99,247 297,742 148,871 446,614 223,307 669,922 334,961 1,004,884 502,442 251,221 753,664 376,832 188,416 94,208 47,104 23,552 11,776 5,888 2,944 1,472 736 368 184 92 46

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