1,646,884

2² × 411721

Starting at 1,646,884, the Collatz iteration reaches 1 after 282 steps. The first transition is 823442; the starting value is even with 6 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 411721

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 2,882,054

Proper Divisor Sum 1,235,170

Digit Sum / Digital Root 37 (Root: 1)

Adjacent Primes #1646861 ← → #1646893

Radix Representation

Decimal	1646884
Binary	110010010000100100100 (21 bits)
Octal	0o6220444
Hexadecimal	0x192124

Divisor Catalog (6)

1 2 4 411,721 823,442 1,646,884

Collatz Trajectory (282 steps to reach 1)

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

1,646,884 823,442 411,721 1,235,164 617,582 308,791 926,374 463,187 1,389,562 694,781 2,084,344 1,042,172 521,086 260,543 781,630 390,815 1,172,446 586,223 1,758,670 879,335 2,638,006 1,319,003 3,957,010 1,978,505 5,935,516 2,967,758 1,483,879 4,451,638 2,225,819 6,677,458 3,338,729 10,016,188 5,008,094 2,504,047 7,512,142 3,756,071 11,268,214 5,634,107 16,902,322 8,451,161 25,353,484 12,676,742 6,338,371 19,015,114 9,507,557 28,522,672 14,261,336 7,130,668 3,565,334 1,782,667 5,348,002 2,674,001 8,022,004 4,011,002 2,005,501 6,016,504 3,008,252 1,504,126 752,063 2,256,190

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