4,247,555

5 × 13 × 101 × 647

Starting at 4,247,555, the Collatz iteration reaches 1 after 273 steps. The first transition is 12742666; the starting value is odd with 16 positive divisors.

Prime Factor Structure

Factorization String 5 × 13 × 101 × 647

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 5,552,064

Proper Divisor Sum 1,304,509

Digit Sum / Digital Root 32 (Root: 5)

Adjacent Primes #4247549 ← → #4247561

Radix Representation

Decimal	4247555
Binary	10000001101000000000011 (23 bits)
Octal	0o20150003
Hexadecimal	0x40D003

Divisor Catalog (16)

1 5 13 65 101 505 647 1,313 3,235 6,565 8,411 42,055 65,347 326,735 849,511 4,247,555

Collatz Trajectory (273 steps to reach 1)

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

4,247,555 12,742,666 6,371,333 19,114,000 9,557,000 4,778,500 2,389,250 1,194,625 3,583,876 1,791,938 895,969 2,687,908 1,343,954 671,977 2,015,932 1,007,966 503,983 1,511,950 755,975 2,267,926 1,133,963 3,401,890 1,700,945 5,102,836 2,551,418 1,275,709 3,827,128 1,913,564 956,782 478,391 1,435,174 717,587 2,152,762 1,076,381 3,229,144 1,614,572 807,286 403,643 1,210,930 605,465 1,816,396 908,198 454,099 1,362,298 681,149 2,043,448 1,021,724 510,862 255,431 766,294 383,147 1,149,442 574,721 1,724,164 862,082 431,041 1,293,124 646,562 323,281 969,844

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