256,145

5 × 51229

Starting at 256,145, the Collatz iteration reaches 1 after 88 steps. The first transition is 768436; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 5 × 51229

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 307,380

Proper Divisor Sum 51,235

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #256133 ← → #256147

Radix Representation

Decimal	256145
Binary	111110100010010001 (18 bits)
Octal	0o764221
Hexadecimal	0x3E891

Divisor Catalog (4)

1 5 51,229 256,145

Collatz Trajectory (88 steps to reach 1)

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

256,145 768,436 384,218 192,109 576,328 288,164 144,082 72,041 216,124 108,062 54,031 162,094 81,047 243,142 121,571 364,714 182,357 547,072 273,536 136,768 68,384 34,192 17,096 8,548 4,274 2,137 6,412 3,206 1,603 4,810 2,405 7,216 3,608 1,804 902 451 1,354 677 2,032 1,016 508 254 127 382 191 574 287 862 431 1,294 647 1,942 971 2,914 1,457 4,372 2,186 1,093 3,280 1,640

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