λ
Sigma Notebook

1,781,085

3 × 5 × 118739
Deficient Odd Composite

1,781,085 is odd and not a perfect square. Its factorization is 3 × 5 × 118739 and its 8 divisors sum to 2,849,760.

Prime Factor Structure

Factorization String 3 × 5 × 118739
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 2,849,760
Proper Divisor Sum 1,068,675
Digit Sum / Digital Root 30 (Root: 3)
Adjacent Primes #1781063 ← → #1781089

Radix Representation

Decimal 1781085
Binary 110110010110101011101 (21 bits)
Octal 0o6626535
Hexadecimal 0x1B2D5D

Divisor Catalog (8)

1 3 5 15 118,739 356,217 593,695 1,781,085

Collatz Trajectory (96 steps to reach 1)

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

1,781,085 5,343,256 2,671,628 1,335,814 667,907 2,003,722 1,001,861 3,005,584 1,502,792 751,396 375,698 187,849 563,548 281,774 140,887 422,662 211,331 633,994 316,997 950,992 475,496 237,748 118,874 59,437 178,312 89,156 44,578 22,289 66,868 33,434 16,717 50,152 25,076 12,538 6,269 18,808 9,404 4,702 2,351 7,054 3,527 10,582 5,291 15,874 7,937 23,812 11,906 5,953 17,860 8,930 4,465 13,396 6,698 3,349 10,048 5,024 2,512 1,256 628 314

More profiles

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