1,287,302

2 × 643651

Starting at 1,287,302, the Collatz iteration reaches 1 after 124 steps. The first transition is 643651; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 643651

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,930,956

Proper Divisor Sum 643,654

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #1287289 ← → #1287323

Radix Representation

Decimal	1287302
Binary	100111010010010000110 (21 bits)
Octal	0o4722206
Hexadecimal	0x13A486

Divisor Catalog (4)

1 2 643,651 1,287,302

Collatz Trajectory (124 steps to reach 1)

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

1,287,302 643,651 1,930,954 965,477 2,896,432 1,448,216 724,108 362,054 181,027 543,082 271,541 814,624 407,312 203,656 101,828 50,914 25,457 76,372 38,186 19,093 57,280 28,640 14,320 7,160 3,580 1,790 895 2,686 1,343 4,030 2,015 6,046 3,023 9,070 4,535 13,606 6,803 20,410 10,205 30,616 15,308 7,654 3,827 11,482 5,741 17,224 8,612 4,306 2,153 6,460 3,230 1,615 4,846 2,423 7,270 3,635 10,906 5,453 16,360 8,180

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