1,213,655

5 × 242731

Starting at 1,213,655, the Collatz iteration reaches 1 after 67 steps. The first transition is 3640966; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 5 × 242731

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,456,392

Proper Divisor Sum 242,737

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #1213651 ← → #1213657

Radix Representation

Decimal	1213655
Binary	100101000010011010111 (21 bits)
Octal	0o4502327
Hexadecimal	0x1284D7

Divisor Catalog (4)

1 5 242,731 1,213,655

Collatz Trajectory (67 steps to reach 1)

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

1,213,655 3,640,966 1,820,483 5,461,450 2,730,725 8,192,176 4,096,088 2,048,044 1,024,022 512,011 1,536,034 768,017 2,304,052 1,152,026 576,013 1,728,040 864,020 432,010 216,005 648,016 324,008 162,004 81,002 40,501 121,504 60,752 30,376 15,188 7,594 3,797 11,392 5,696 2,848 1,424 712 356 178 89 268 134 67 202 101 304 152 76 38 19 58 29 88 44 22 11 34 17 52 26 13 40

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