1,304,840

2³ × 5 × 32621

Starting at 1,304,840, the Collatz iteration reaches 1 after 80 steps. The first transition is 652420; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2^3 × 5 × 32621

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 2,935,980

Proper Divisor Sum 1,631,140

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #1304837 ← → #1304857

Radix Representation

Decimal	1304840
Binary	100111110100100001000 (21 bits)
Octal	0o4764410
Hexadecimal	0x13E908

Divisor Catalog (16)

1 2 4 5 8 10 20 40 32,621 65,242 130,484 163,105 260,968 326,210 652,420 1,304,840

Collatz Trajectory (80 steps to reach 1)

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

1,304,840 652,420 326,210 163,105 489,316 244,658 122,329 366,988 183,494 91,747 275,242 137,621 412,864 206,432 103,216 51,608 25,804 12,902 6,451 19,354 9,677 29,032 14,516 7,258 3,629 10,888 5,444 2,722 1,361 4,084 2,042 1,021 3,064 1,532 766 383 1,150 575 1,726 863 2,590 1,295 3,886 1,943 5,830 2,915 8,746 4,373 13,120 6,560 3,280 1,640 820 410 205 616 308 154 77 232

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