λ
Sigma Notebook

1,971,689

107 × 18427
Deficient Odd Composite

1,971,689 is odd and not a perfect square. Its factorization is 107 × 18427 and its 4 divisors sum to 1,990,224.

Prime Factor Structure

Factorization String 107 × 18427
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 1,990,224
Proper Divisor Sum 18,535
Digit Sum / Digital Root 41 (Root: 5)
Adjacent Primes #1971667 ← → #1971691

Radix Representation

Decimal 1971689
Binary 111100001010111101001 (21 bits)
Octal 0o7412751
Hexadecimal 0x1E15E9

Divisor Catalog (4)

1 107 18,427 1,971,689

Collatz Trajectory (202 steps to reach 1)

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

1,971,689 5,915,068 2,957,534 1,478,767 4,436,302 2,218,151 6,654,454 3,327,227 9,981,682 4,990,841 14,972,524 7,486,262 3,743,131 11,229,394 5,614,697 16,844,092 8,422,046 4,211,023 12,633,070 6,316,535 18,949,606 9,474,803 28,424,410 14,212,205 42,636,616 21,318,308 10,659,154 5,329,577 15,988,732 7,994,366 3,997,183 11,991,550 5,995,775 17,987,326 8,993,663 26,980,990 13,490,495 40,471,486 20,235,743 60,707,230 30,353,615 91,060,846 45,530,423 136,591,270 68,295,635 204,886,906 102,443,453 307,330,360 153,665,180 76,832,590 38,416,295 115,248,886 57,624,443 172,873,330 86,436,665 259,309,996 129,654,998 64,827,499 194,482,498 97,241,249

More profiles

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