λ
Sigma Notebook

1,815,877

7 × 259411
Deficient Odd Composite

1,815,877 is odd and not a perfect square. Its factorization is 7 × 259411 and its 4 divisors sum to 2,075,296.

Prime Factor Structure

Factorization String 7 × 259411
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 2,075,296
Proper Divisor Sum 259,419
Digit Sum / Digital Root 37 (Root: 1)
Adjacent Primes #1815871 ← → #1815881

Radix Representation

Decimal 1815877
Binary 110111011010101000101 (21 bits)
Octal 0o6732505
Hexadecimal 0x1BB545

Divisor Catalog (4)

1 7 259,411 1,815,877

Collatz Trajectory (70 steps to reach 1)

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

1,815,877 5,447,632 2,723,816 1,361,908 680,954 340,477 1,021,432 510,716 255,358 127,679 383,038 191,519 574,558 287,279 861,838 430,919 1,292,758 646,379 1,939,138 969,569 2,908,708 1,454,354 727,177 2,181,532 1,090,766 545,383 1,636,150 818,075 2,454,226 1,227,113 3,681,340 1,840,670 920,335 2,761,006 1,380,503 4,141,510 2,070,755 6,212,266 3,106,133 9,318,400 4,659,200 2,329,600 1,164,800 582,400 291,200 145,600 72,800 36,400 18,200 9,100 4,550 2,275 6,826 3,413 10,240 5,120 2,560 1,280 640 320

More profiles

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