6,439,745

5 × 13² × 7621

6,439,745 factors as 5 × 13^2 × 7621. Its 12 positive divisors give a proper-divisor sum of 1,929,211, so this integer is deficient. The Collatz stopping time is 116 steps.

Prime Factor Structure

Factorization String 5 × 13^2 × 7621

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 8,368,956

Proper Divisor Sum 1,929,211

Digit Sum / Digital Root 38 (Root: 2)

Adjacent Primes #6439729 ← → #6439751

Radix Representation

Decimal	6439745
Binary	11000100100001101000001 (23 bits)
Octal	0o30441501
Hexadecimal	0x624341

Divisor Catalog (12)

1 5 13 65 169 845 7,621 38,105 99,073 495,365 1,287,949 6,439,745

Collatz Trajectory (116 steps to reach 1)

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

6,439,745 19,319,236 9,659,618 4,829,809 14,489,428 7,244,714 3,622,357 10,867,072 5,433,536 2,716,768 1,358,384 679,192 339,596 169,798 84,899 254,698 127,349 382,048 191,024 95,512 47,756 23,878 11,939 35,818 17,909 53,728 26,864 13,432 6,716 3,358 1,679 5,038 2,519 7,558 3,779 11,338 5,669 17,008 8,504 4,252 2,126 1,063 3,190 1,595 4,786 2,393 7,180 3,590 1,795 5,386 2,693 8,080 4,040 2,020 1,010 505 1,516 758 379 1,138

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