2,557,028

2² × 639257

Starting at 2,557,028, the Collatz iteration reaches 1 after 125 steps. The first transition is 1278514; the starting value is even with 6 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 639257

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 4,474,806

Proper Divisor Sum 1,917,778

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #2557013 ← → #2557063

Radix Representation

Decimal	2557028
Binary	1001110000010001100100 (22 bits)
Octal	0o11602144
Hexadecimal	0x270464

Divisor Catalog (6)

1 2 4 639,257 1,278,514 2,557,028

Collatz Trajectory (125 steps to reach 1)

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

2,557,028 1,278,514 639,257 1,917,772 958,886 479,443 1,438,330 719,165 2,157,496 1,078,748 539,374 269,687 809,062 404,531 1,213,594 606,797 1,820,392 910,196 455,098 227,549 682,648 341,324 170,662 85,331 255,994 127,997 383,992 191,996 95,998 47,999 143,998 71,999 215,998 107,999 323,998 161,999 485,998 242,999 728,998 364,499 1,093,498 546,749 1,640,248 820,124 410,062 205,031 615,094 307,547 922,642 461,321 1,383,964 691,982 345,991 1,037,974 518,987 1,556,962 778,481 2,335,444 1,167,722 583,861

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