1,228,721

13 × 47 × 2011

1,228,721 is odd and not a perfect square. Its factorization is 13 × 47 × 2011 and its 8 divisors sum to 1,352,064.

Prime Factor Structure

Factorization String 13 × 47 × 2011

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 1,352,064

Proper Divisor Sum 123,343

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #1228693 ← → #1228741

Radix Representation

Decimal	1228721
Binary	100101011111110110001 (21 bits)
Octal	0o4537661
Hexadecimal	0x12BFB1

Divisor Catalog (8)

1 13 47 611 2,011 26,143 94,517 1,228,721

Collatz Trajectory (173 steps to reach 1)

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

1,228,721 3,686,164 1,843,082 921,541 2,764,624 1,382,312 691,156 345,578 172,789 518,368 259,184 129,592 64,796 32,398 16,199 48,598 24,299 72,898 36,449 109,348 54,674 27,337 82,012 41,006 20,503 61,510 30,755 92,266 46,133 138,400 69,200 34,600 17,300 8,650 4,325 12,976 6,488 3,244 1,622 811 2,434 1,217 3,652 1,826 913 2,740 1,370 685 2,056 1,028 514 257 772 386 193 580 290 145 436 218

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