λ
Sequence Observatory

1,298,672

24 × 23 × 3529
Abundant Even Composite

Starting at 1,298,672, the Collatz iteration reaches 1 after 178 steps. The first transition is 649336; the starting value is even with 20 positive divisors.

Resources

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Prime Factor Structure

Factorization String 2^4 × 23 × 3529
Distinct Prime Factors 3
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 20
Divisor Sum (σ) 2,626,320
Proper Divisor Sum 1,327,648
Digit Sum / Digital Root 35 (Root: 8)
Adjacent Primes #1298653 ← → #1298699

Radix Representation

Decimal 1298672
Binary 100111101000011110000 (21 bits)
Octal 0o4750360
Hexadecimal 0x13D0F0

Divisor Catalog (5 of 20)

1 2 4 8 16

Collatz Trajectory (178 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.

1,298,672 649,336 324,668 162,334 81,167

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