1,815,285

3 × 5 × 121019

Starting at 1,815,285, the Collatz iteration reaches 1 after 189 steps. The first transition is 5445856; the starting value is odd with 8 positive divisors.

Prime Factor Structure

Factorization String 3 × 5 × 121019

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 2,904,480

Proper Divisor Sum 1,089,195

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #1815271 ← → #1815287

Radix Representation

Decimal	1815285
Binary	110111011001011110101 (21 bits)
Octal	0o6731365
Hexadecimal	0x1BB2F5

Divisor Catalog (8)

1 3 5 15 121,019 363,057 605,095 1,815,285

Collatz Trajectory (189 steps to reach 1)

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

1,815,285 5,445,856 2,722,928 1,361,464 680,732 340,366 170,183 510,550 255,275 765,826 382,913 1,148,740 574,370 287,185 861,556 430,778 215,389 646,168 323,084 161,542 80,771 242,314 121,157 363,472 181,736 90,868 45,434 22,717 68,152 34,076 17,038 8,519 25,558 12,779 38,338 19,169 57,508 28,754 14,377 43,132 21,566 10,783 32,350 16,175 48,526 24,263 72,790 36,395 109,186 54,593 163,780 81,890 40,945 122,836 61,418 30,709 92,128 46,064 23,032 11,516

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