1,644,425

5² × 65777

Starting at 1,644,425, the Collatz iteration reaches 1 after 238 steps. The first transition is 4933276; the starting value is odd with 6 positive divisors.

Prime Factor Structure

Factorization String 5^2 × 65777

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 2,039,118

Proper Divisor Sum 394,693

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #1644421 ← → #1644437

Radix Representation

Decimal	1644425
Binary	110010001011110001001 (21 bits)
Octal	0o6213611
Hexadecimal	0x191789

Divisor Catalog (6)

1 5 25 65,777 328,885 1,644,425

Collatz Trajectory (238 steps to reach 1)

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

1,644,425 4,933,276 2,466,638 1,233,319 3,699,958 1,849,979 5,549,938 2,774,969 8,324,908 4,162,454 2,081,227 6,243,682 3,121,841 9,365,524 4,682,762 2,341,381 7,024,144 3,512,072 1,756,036 878,018 439,009 1,317,028 658,514 329,257 987,772 493,886 246,943 740,830 370,415 1,111,246 555,623 1,666,870 833,435 2,500,306 1,250,153 3,750,460 1,875,230 937,615 2,812,846 1,406,423 4,219,270 2,109,635 6,328,906 3,164,453 9,493,360 4,746,680 2,373,340 1,186,670 593,335 1,780,006 890,003 2,670,010 1,335,005 4,005,016 2,002,508 1,001,254 500,627 1,501,882 750,941 2,252,824

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