6,393,721

1279 × 4999

Starting at 6,393,721, the Collatz iteration reaches 1 after 240 steps. The first transition is 19181164; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 1279 × 4999

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 6,400,000

Proper Divisor Sum 6,279

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #6393691 ← → #6393731

Radix Representation

Decimal	6393721
Binary	11000011000111101111001 (23 bits)
Octal	0o30307571
Hexadecimal	0x618F79

Divisor Catalog (4)

1 1,279 4,999 6,393,721

Collatz Trajectory (240 steps to reach 1)

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

6,393,721 19,181,164 9,590,582 4,795,291 14,385,874 7,192,937 21,578,812 10,789,406 5,394,703 16,184,110 8,092,055 24,276,166 12,138,083 36,414,250 18,207,125 54,621,376 27,310,688 13,655,344 6,827,672 3,413,836 1,706,918 853,459 2,560,378 1,280,189 3,840,568 1,920,284 960,142 480,071 1,440,214 720,107 2,160,322 1,080,161 3,240,484 1,620,242 810,121 2,430,364 1,215,182 607,591 1,822,774 911,387 2,734,162 1,367,081 4,101,244 2,050,622 1,025,311 3,075,934 1,537,967 4,613,902 2,306,951 6,920,854 3,460,427 10,381,282 5,190,641 15,571,924 7,785,962 3,892,981 11,678,944 5,839,472 2,919,736 1,459,868

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