λ
Sequence Observatory

4,021,472

25 × 7 × 13 × 1381
Abundant Even Composite

Starting at 4,021,472, the Collatz iteration reaches 1 after 185 steps. The first transition is 2010736; the starting value is even with 48 positive divisors.

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Prime Factor Structure

Factorization String 2^5 × 7 × 13 × 1381
Distinct Prime Factors 4
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 48
Divisor Sum (σ) 9,751,392
Proper Divisor Sum 5,729,920
Digit Sum / Digital Root 20 (Root: 2)
Adjacent Primes #4021471 ← → #4021477

Radix Representation

Decimal 4021472
Binary 1111010101110011100000 (22 bits)
Octal 0o17256340
Hexadecimal 0x3D5CE0

Divisor Catalog (5 of 48)

1 2 4 7 8

Collatz Trajectory (185 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.

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