1,645,469

7² × 33581

1,645,469 factors as 7^2 × 33581. Its 6 positive divisors give a proper-divisor sum of 268,705, so this integer is deficient. The Collatz stopping time is 168 steps.

Prime Factor Structure

Factorization String 7^2 × 33581

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 1,914,174

Proper Divisor Sum 268,705

Digit Sum / Digital Root 35 (Root: 8)

Adjacent Primes #1645463 ← → #1645477

Radix Representation

Decimal	1645469
Binary	110010001101110011101 (21 bits)
Octal	0o6215635
Hexadecimal	0x191B9D

Divisor Catalog (6)

1 7 49 33,581 235,067 1,645,469

Collatz Trajectory (168 steps to reach 1)

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

1,645,469 4,936,408 2,468,204 1,234,102 617,051 1,851,154 925,577 2,776,732 1,388,366 694,183 2,082,550 1,041,275 3,123,826 1,561,913 4,685,740 2,342,870 1,171,435 3,514,306 1,757,153 5,271,460 2,635,730 1,317,865 3,953,596 1,976,798 988,399 2,965,198 1,482,599 4,447,798 2,223,899 6,671,698 3,335,849 10,007,548 5,003,774 2,501,887 7,505,662 3,752,831 11,258,494 5,629,247 16,887,742 8,443,871 25,331,614 12,665,807 37,997,422 18,998,711 56,996,134 28,498,067 85,494,202 42,747,101 128,241,304 64,120,652 32,060,326 16,030,163 48,090,490 24,045,245 72,135,736 36,067,868 18,033,934 9,016,967 27,050,902 13,525,451

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