λ
Ratio Atlas

128,291

128291
Deficient Odd Prime

Prime Factor Structure

Factorization String 128291
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 128,292
Proper Divisor Sum 1
Digit Sum / Digital Root 23 (Root: 5)
Adjacent Primes #128287 ← → #128311

Radix Representation

Decimal 128291
Binary 11111010100100011 (17 bits)
Octal 0o372443
Hexadecimal 0x1F523

Divisor Catalog (2)

Collatz Trajectory (149 steps to reach 1)

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

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