1,287,182

2 × 13 × 31 × 1597

Starting at 1,287,182, the Collatz iteration reaches 1 after 111 steps. The first transition is 643591; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2 × 13 × 31 × 1597

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 2,147,712

Proper Divisor Sum 860,530

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #1287179 ← → #1287197

Radix Representation

Decimal	1287182
Binary	100111010010000001110 (21 bits)
Octal	0o4722016
Hexadecimal	0x13A40E

Divisor Catalog (16)

1 2 13 26 31 62 403 806 1,597 3,194 20,761 41,522 49,507 99,014 643,591 1,287,182

Collatz Trajectory (111 steps to reach 1)

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

1,287,182 643,591 1,930,774 965,387 2,896,162 1,448,081 4,344,244 2,172,122 1,086,061 3,258,184 1,629,092 814,546 407,273 1,221,820 610,910 305,455 916,366 458,183 1,374,550 687,275 2,061,826 1,030,913 3,092,740 1,546,370 773,185 2,319,556 1,159,778 579,889 1,739,668 869,834 434,917 1,304,752 652,376 326,188 163,094 81,547 244,642 122,321 366,964 183,482 91,741 275,224 137,612 68,806 34,403 103,210 51,605 154,816 77,408 38,704 19,352 9,676 4,838 2,419 7,258 3,629 10,888 5,444 2,722 1,361

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