λ
Sequence Observatory

1,805,911

1805911
Deficient Odd Prime

Starting at 1,805,911, the Collatz iteration reaches 1 after 114 steps. The first transition is 5417734; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 1805911
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 1,805,912
Proper Divisor Sum 1
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #1805897 ← → #1805941

Radix Representation

Decimal 1805911
Binary 110111000111001010111 (21 bits)
Octal 0o6707127
Hexadecimal 0x1B8E57

Divisor Catalog (2)

Collatz Trajectory (114 steps to reach 1)

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

1,805,911 5,417,734 2,708,867 8,126,602 4,063,301 12,189,904 6,094,952 3,047,476 1,523,738 761,869 2,285,608 1,142,804 571,402 285,701 857,104 428,552 214,276 107,138 53,569 160,708 80,354 40,177 120,532 60,266 30,133 90,400 45,200 22,600 11,300 5,650 2,825 8,476 4,238 2,119 6,358 3,179 9,538 4,769 14,308 7,154 3,577 10,732 5,366 2,683 8,050 4,025 12,076 6,038 3,019 9,058 4,529 13,588 6,794 3,397 10,192 5,096 2,548 1,274 637 1,912

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