λ
Sequence Observatory

1,755,421

1755421
Deficient Odd Prime

Starting at 1,755,421, the Collatz iteration reaches 1 after 83 steps. The first transition is 5266264; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 1755421
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 1,755,422
Proper Divisor Sum 1
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #1755401 ← → #1755443

Radix Representation

Decimal 1755421
Binary 110101100100100011101 (21 bits)
Octal 0o6544435
Hexadecimal 0x1AC91D

Divisor Catalog (2)

Collatz Trajectory (83 steps to reach 1)

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

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