3,986,149

127 × 31387

Starting at 3,986,149, the Collatz iteration reaches 1 after 216 steps. The first transition is 11958448; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 127 × 31387

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 4,017,664

Proper Divisor Sum 31,515

Digit Sum / Digital Root 40 (Root: 4)

Adjacent Primes #3986113 ← → #3986159

Radix Representation

Decimal	3986149
Binary	1111001101001011100101 (22 bits)
Octal	0o17151345
Hexadecimal	0x3CD2E5

Divisor Catalog (4)

1 127 31,387 3,986,149

Collatz Trajectory (216 steps to reach 1)

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

3,986,149 11,958,448 5,979,224 2,989,612 1,494,806 747,403 2,242,210 1,121,105 3,363,316 1,681,658 840,829 2,522,488 1,261,244 630,622 315,311 945,934 472,967 1,418,902 709,451 2,128,354 1,064,177 3,192,532 1,596,266 798,133 2,394,400 1,197,200 598,600 299,300 149,650 74,825 224,476 112,238 56,119 168,358 84,179 252,538 126,269 378,808 189,404 94,702 47,351 142,054 71,027 213,082 106,541 319,624 159,812 79,906 39,953 119,860 59,930 29,965 89,896 44,948 22,474 11,237 33,712 16,856 8,428 4,214

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