3² × 7 × 61 × 67

Prime Factor Structure

Factorization String 3^2 × 7 × 61 × 67

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 438,464

Proper Divisor Sum 180,983

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #257473 ← → #257489

1 3 7 9 21 61 63 67 183 201 427 469 549 603 1,281 1,407 3,843 4,087 4,221 12,261 28,609 36,783 85,827 257,481

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

257,481 772,444 386,222 193,111 579,334 289,667 869,002 434,501 1,303,504 651,752 325,876 162,938 81,469 244,408 122,204 61,102 30,551 91,654 45,827 137,482 68,741 206,224 103,112 51,556 25,778 12,889 38,668 19,334 9,667 29,002 14,501 43,504 21,752 10,876 5,438 2,719 8,158 4,079 12,238 6,119 18,358 9,179 27,538 13,769 41,308 20,654 10,327 30,982 15,491 46,474 23,237 69,712 34,856 17,428 8,714 4,357 13,072 6,536 3,268 1,634

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