λ
Sigma Notebook

1,635,566

2 × 817783
Deficient Even Composite

1,635,566 is even and not a perfect square. Its factorization is 2 × 817783 and its 4 divisors sum to 2,453,352.

Prime Factor Structure

Factorization String 2 × 817783
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 2,453,352
Proper Divisor Sum 817,786
Digit Sum / Digital Root 32 (Root: 5)
Adjacent Primes #1635563 ← → #1635583

Radix Representation

Decimal 1635566
Binary 110001111010011101110 (21 bits)
Octal 0o6172356
Hexadecimal 0x18F4EE

Divisor Catalog (4)

1 2 817,783 1,635,566

Collatz Trajectory (44 steps to reach 1)

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

1,635,566 817,783 2,453,350 1,226,675 3,680,026 1,840,013 5,520,040 2,760,020 1,380,010 690,005 2,070,016 1,035,008 517,504 258,752 129,376 64,688 32,344 16,172 8,086 4,043 12,130 6,065 18,196 9,098 4,549 13,648 6,824 3,412 1,706 853 2,560 1,280 640 320 160 80 40 20 10 5 16 8 4 2 1

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