1,641,900

2² × 3 × 5² × 13 × 421

Prime Factor Structure

Factorization String 2^2 × 3 × 5^2 × 13 × 421

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Total Divisors 72

Divisor Sum (σ) 5,128,144

Proper Divisor Sum 3,486,244

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #1641889 ← → #1641907

1 2 3 4 5 6 10 12 13 15 20 25 26 30 39 50 52 60 65 75 78 100 130 150 156 195 260 300 325 390 421 650 780 842 975 1,263 1,300 1,684 1,950 2,105 2,526 3,900 4,210 5,052 5,473 6,315 8,420 10,525 10,946 12,630 16,419 21,050 21,892 25,260 27,365 31,575 32,838 42,100 54,730 63,150

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

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