4,012,139

71 × 56509

Starting at 4,012,139, the Collatz iteration reaches 1 after 154 steps. The first transition is 12036418; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 71 × 56509

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 4,068,720

Proper Divisor Sum 56,581

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #4012133 ← → #4012147

Radix Representation

Decimal	4012139
Binary	1111010011100001101011 (22 bits)
Octal	0o17234153
Hexadecimal	0x3D386B

Divisor Catalog (4)

1 71 56,509 4,012,139

Collatz Trajectory (154 steps to reach 1)

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

4,012,139 12,036,418 6,018,209 18,054,628 9,027,314 4,513,657 13,540,972 6,770,486 3,385,243 10,155,730 5,077,865 15,233,596 7,616,798 3,808,399 11,425,198 5,712,599 17,137,798 8,568,899 25,706,698 12,853,349 38,560,048 19,280,024 9,640,012 4,820,006 2,410,003 7,230,010 3,615,005 10,845,016 5,422,508 2,711,254 1,355,627 4,066,882 2,033,441 6,100,324 3,050,162 1,525,081 4,575,244 2,287,622 1,143,811 3,431,434 1,715,717 5,147,152 2,573,576 1,286,788 643,394 321,697 965,092 482,546 241,273 723,820 361,910 180,955 542,866 271,433 814,300 407,150 203,575 610,726 305,363 916,090

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