1,218,009

3 × 13 × 31231

1,218,009 factors as 3 × 13 × 31231. Its 8 positive divisors give a proper-divisor sum of 530,983, so this integer is deficient. The Collatz stopping time is 222 steps.

Prime Factor Structure

Factorization String 3 × 13 × 31231

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 1,748,992

Proper Divisor Sum 530,983

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #1217989 ← → #1218017

Radix Representation

Decimal	1218009
Binary	100101001010111011001 (21 bits)
Octal	0o4512731
Hexadecimal	0x1295D9

Divisor Catalog (8)

1 3 13 39 31,231 93,693 406,003 1,218,009

Collatz Trajectory (222 steps to reach 1)

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

1,218,009 3,654,028 1,827,014 913,507 2,740,522 1,370,261 4,110,784 2,055,392 1,027,696 513,848 256,924 128,462 64,231 192,694 96,347 289,042 144,521 433,564 216,782 108,391 325,174 162,587 487,762 243,881 731,644 365,822 182,911 548,734 274,367 823,102 411,551 1,234,654 617,327 1,851,982 925,991 2,777,974 1,388,987 4,166,962 2,083,481 6,250,444 3,125,222 1,562,611 4,687,834 2,343,917 7,031,752 3,515,876 1,757,938 878,969 2,636,908 1,318,454 659,227 1,977,682 988,841 2,966,524 1,483,262 741,631 2,224,894 1,112,447 3,337,342 1,668,671

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