3 × 5² × 7 × 23 × 53

Prime Factor Structure

Factorization String 3 × 5^2 × 7 × 23 × 53

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 48

Divisor Sum (σ) 1,285,632

Proper Divisor Sum 645,657

Digit Sum / Digital Root 39 (Root: 3)

Adjacent Primes #639959 ← → #639983

1 3 5 7 15 21 23 25 35 53 69 75 105 115 159 161 175 265 345 371 483 525 575 795 805 1,113 1,219 1,325 1,725 1,855 2,415 3,657 3,975 4,025 5,565 6,095 8,533 9,275 12,075 18,285 25,599 27,825 30,475 42,665 91,425 127,995 213,325 639,975

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

639,975 1,919,926 959,963 2,879,890 1,439,945 4,319,836 2,159,918 1,079,959 3,239,878 1,619,939 4,859,818 2,429,909 7,289,728 3,644,864 1,822,432 911,216 455,608 227,804 113,902 56,951 170,854 85,427 256,282 128,141 384,424 192,212 96,106 48,053 144,160 72,080 36,040 18,020 9,010 4,505 13,516 6,758 3,379 10,138 5,069 15,208 7,604 3,802 1,901 5,704 2,852 1,426 713 2,140 1,070 535 1,606 803 2,410 1,205 3,616 1,808 904 452 226 113

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