1,998,149

1153 × 1733

Starting at 1,998,149, the Collatz iteration reaches 1 after 140 steps. The first transition is 5994448; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 1153 × 1733

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 2,001,036

Proper Divisor Sum 2,887

Digit Sum / Digital Root 41 (Root: 5)

Adjacent Primes #1998133 ← → #1998169

Radix Representation

Decimal	1998149
Binary	111100111110101000101 (21 bits)
Octal	0o7476505
Hexadecimal	0x1E7D45

Divisor Catalog (4)

1 1,153 1,733 1,998,149

Collatz Trajectory (140 steps to reach 1)

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

1,998,149 5,994,448 2,997,224 1,498,612 749,306 374,653 1,123,960 561,980 280,990 140,495 421,486 210,743 632,230 316,115 948,346 474,173 1,422,520 711,260 355,630 177,815 533,446 266,723 800,170 400,085 1,200,256 600,128 300,064 150,032 75,016 37,508 18,754 9,377 28,132 14,066 7,033 21,100 10,550 5,275 15,826 7,913 23,740 11,870 5,935 17,806 8,903 26,710 13,355 40,066 20,033 60,100 30,050 15,025 45,076 22,538 11,269 33,808 16,904 8,452 4,226 2,113

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