λ
Sequence Observatory

3,956,479

181 × 21859
Deficient Odd Composite

Starting at 3,956,479, the Collatz iteration reaches 1 after 123 steps. The first transition is 11869438; the starting value is odd with 4 positive divisors.

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Prime Factor Structure

Factorization String 181 × 21859
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 3,978,520
Proper Divisor Sum 22,041
Digit Sum / Digital Root 43 (Root: 7)
Adjacent Primes #3956471 ← → #3956501

Radix Representation

Decimal 3956479
Binary 1111000101111011111111 (22 bits)
Octal 0o17057377
Hexadecimal 0x3C5EFF

Divisor Catalog (4)

1 181 21,859 3,956,479

Collatz Trajectory (123 steps to reach 1)

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

Showing the first 5 trajectory entries; the stopping-time total above is unchanged.

3,956,479 11,869,438 5,934,719 17,804,158 8,902,079

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