1,780,909

13 × 136993

1,780,909 factors as 13 × 136993. Its 4 positive divisors give a proper-divisor sum of 137,007, so this integer is deficient. The Collatz stopping time is 145 steps.

Prime Factor Structure

Factorization String 13 × 136993

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,917,916

Proper Divisor Sum 137,007

Digit Sum / Digital Root 34 (Root: 7)

Adjacent Primes #1780901 ← → #1780939

Radix Representation

Decimal	1780909
Binary	110110010110010101101 (21 bits)
Octal	0o6626255
Hexadecimal	0x1B2CAD

Divisor Catalog (4)

1 13 136,993 1,780,909

Collatz Trajectory (145 steps to reach 1)

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

1,780,909 5,342,728 2,671,364 1,335,682 667,841 2,003,524 1,001,762 500,881 1,502,644 751,322 375,661 1,126,984 563,492 281,746 140,873 422,620 211,310 105,655 316,966 158,483 475,450 237,725 713,176 356,588 178,294 89,147 267,442 133,721 401,164 200,582 100,291 300,874 150,437 451,312 225,656 112,828 56,414 28,207 84,622 42,311 126,934 63,467 190,402 95,201 285,604 142,802 71,401 214,204 107,102 53,551 160,654 80,327 240,982 120,491 361,474 180,737 542,212 271,106 135,553 406,660

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