2 × 5² × 12809

Prime Factor Structure

Factorization String 2 × 5^2 × 12809

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 1,191,330

Proper Divisor Sum 550,880

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #640421 ← → #640457

1 2 5 10 25 50 12,809 25,618 64,045 128,090 320,225 640,450

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

640,450 320,225 960,676 480,338 240,169 720,508 360,254 180,127 540,382 270,191 810,574 405,287 1,215,862 607,931 1,823,794 911,897 2,735,692 1,367,846 683,923 2,051,770 1,025,885 3,077,656 1,538,828 769,414 384,707 1,154,122 577,061 1,731,184 865,592 432,796 216,398 108,199 324,598 162,299 486,898 243,449 730,348 365,174 182,587 547,762 273,881 821,644 410,822 205,411 616,234 308,117 924,352 462,176 231,088 115,544 57,772 28,886 14,443 43,330 21,665 64,996 32,498 16,249 48,748 24,374

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.