λ
Sigma Notebook

987,855

3 × 5 × 11 × 5987
Deficient Odd Composite

987,855 is odd and not a perfect square. Its factorization is 3 × 5 × 11 × 5987 and its 16 divisors sum to 1,724,544.

Prime Factor Structure

Factorization String 3 × 5 × 11 × 5987
Distinct Prime Factors 4
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 16
Divisor Sum (σ) 1,724,544
Proper Divisor Sum 736,689
Digit Sum / Digital Root 42 (Root: 6)
Adjacent Primes #987851 ← → #987869

Radix Representation

Decimal 987855
Binary 11110001001011001111 (20 bits)
Octal 0o3611317
Hexadecimal 0xF12CF

Divisor Catalog (16)

1 3 5 11 15 33 55 165 5,987 17,961 29,935 65,857 89,805 197,571 329,285 987,855

Collatz Trajectory (214 steps to reach 1)

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

987,855 2,963,566 1,481,783 4,445,350 2,222,675 6,668,026 3,334,013 10,002,040 5,001,020 2,500,510 1,250,255 3,750,766 1,875,383 5,626,150 2,813,075 8,439,226 4,219,613 12,658,840 6,329,420 3,164,710 1,582,355 4,747,066 2,373,533 7,120,600 3,560,300 1,780,150 890,075 2,670,226 1,335,113 4,005,340 2,002,670 1,001,335 3,004,006 1,502,003 4,506,010 2,253,005 6,759,016 3,379,508 1,689,754 844,877 2,534,632 1,267,316 633,658 316,829 950,488 475,244 237,622 118,811 356,434 178,217 534,652 267,326 133,663 400,990 200,495 601,486 300,743 902,230 451,115 1,353,346

More profiles

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