1,639,452

2² × 3 × 136621

Starting at 1,639,452, the Collatz iteration reaches 1 after 145 steps. The first transition is 819726; the starting value is even with 12 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 3 × 136621

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 3,825,416

Proper Divisor Sum 2,185,964

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #1639427 ← → #1639459

Radix Representation

Decimal	1639452
Binary	110010000010000011100 (21 bits)
Octal	0o6202034
Hexadecimal	0x19041C

Divisor Catalog (12)

1 2 3 4 6 12 136,621 273,242 409,863 546,484 819,726 1,639,452

Collatz Trajectory (145 steps to reach 1)

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

1,639,452 819,726 409,863 1,229,590 614,795 1,844,386 922,193 2,766,580 1,383,290 691,645 2,074,936 1,037,468 518,734 259,367 778,102 389,051 1,167,154 583,577 1,750,732 875,366 437,683 1,313,050 656,525 1,969,576 984,788 492,394 246,197 738,592 369,296 184,648 92,324 46,162 23,081 69,244 34,622 17,311 51,934 25,967 77,902 38,951 116,854 58,427 175,282 87,641 262,924 131,462 65,731 197,194 98,597 295,792 147,896 73,948 36,974 18,487 55,462 27,731 83,194 41,597 124,792 62,396

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