5² × 25639

Prime Factor Structure

Factorization String 5^2 × 25639

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 794,840

Proper Divisor Sum 153,865

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #640973 ← → #640993

1 5 25 25,639 128,195 640,975

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

640,975 1,922,926 961,463 2,884,390 1,442,195 4,326,586 2,163,293 6,489,880 3,244,940 1,622,470 811,235 2,433,706 1,216,853 3,650,560 1,825,280 912,640 456,320 228,160 114,080 57,040 28,520 14,260 7,130 3,565 10,696 5,348 2,674 1,337 4,012 2,006 1,003 3,010 1,505 4,516 2,258 1,129 3,388 1,694 847 2,542 1,271 3,814 1,907 5,722 2,861 8,584 4,292 2,146 1,073 3,220 1,610 805 2,416 1,208 604 302 151 454 227 682

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