663,141

3 × 221047

Starting at 663,141, the Collatz iteration reaches 1 after 123 steps. The first transition is 1989424; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 3 × 221047

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 884,192

Proper Divisor Sum 221,051

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #663127 ← → #663149

Radix Representation

Decimal	663141
Binary	10100001111001100101 (20 bits)
Octal	0o2417145
Hexadecimal	0xA1E65

Divisor Catalog (4)

1 3 221,047 663,141

Collatz Trajectory (123 steps to reach 1)

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

663,141 1,989,424 994,712 497,356 248,678 124,339 373,018 186,509 559,528 279,764 139,882 69,941 209,824 104,912 52,456 26,228 13,114 6,557 19,672 9,836 4,918 2,459 7,378 3,689 11,068 5,534 2,767 8,302 4,151 12,454 6,227 18,682 9,341 28,024 14,012 7,006 3,503 10,510 5,255 15,766 7,883 23,650 11,825 35,476 17,738 8,869 26,608 13,304 6,652 3,326 1,663 4,990 2,495 7,486 3,743 11,230 5,615 16,846 8,423 25,270

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