1,731,625

5³ × 7 × 1979

1,731,625 has digital root 7. The neighboring primes are 1731617 and 1731643; its proper-divisor sum differs from the starting integer by -992,210.

Prime Factor Structure

Factorization String 5^3 × 7 × 1979

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 2,471,040

Proper Divisor Sum 739,415

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #1731617 ← → #1731643

1 5 7 25 35 125 175 875 1,979 9,895 13,853 49,475 69,265 247,375 346,325 1,731,625

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

1,731,625 5,194,876 2,597,438 1,298,719 3,896,158 1,948,079 5,844,238 2,922,119 8,766,358 4,383,179 13,149,538 6,574,769 19,724,308 9,862,154 4,931,077 14,793,232 7,396,616 3,698,308 1,849,154 924,577 2,773,732 1,386,866 693,433 2,080,300 1,040,150 520,075 1,560,226 780,113 2,340,340 1,170,170 585,085 1,755,256 877,628 438,814 219,407 658,222 329,111 987,334 493,667 1,481,002 740,501 2,221,504 1,110,752 555,376 277,688 138,844 69,422 34,711 104,134 52,067 156,202 78,101 234,304 117,152 58,576 29,288 14,644 7,322 3,661 10,984

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