2,664,160

2⁵ × 5 × 16651

Starting at 2,664,160, the Collatz iteration reaches 1 after 143 steps. The first transition is 1332080; the starting value is even with 24 positive divisors.

Prime Factor Structure

Factorization String 2^5 × 5 × 16651

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 6,294,456

Proper Divisor Sum 3,630,296

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #2664149 ← → #2664163

Radix Representation

Decimal	2664160
Binary	1010001010011011100000 (22 bits)
Octal	0o12123340
Hexadecimal	0x28A6E0

Divisor Catalog (24)

1 2 4 5 8 10 16 20 32 40 80 160 16,651 33,302 66,604 83,255 133,208 166,510 266,416 333,020 532,832 666,040 1,332,080 2,664,160

Collatz Trajectory (143 steps to reach 1)

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

2,664,160 1,332,080 666,040 333,020 166,510 83,255 249,766 124,883 374,650 187,325 561,976 280,988 140,494 70,247 210,742 105,371 316,114 158,057 474,172 237,086 118,543 355,630 177,815 533,446 266,723 800,170 400,085 1,200,256 600,128 300,064 150,032 75,016 37,508 18,754 9,377 28,132 14,066 7,033 21,100 10,550 5,275 15,826 7,913 23,740 11,870 5,935 17,806 8,903 26,710 13,355 40,066 20,033 60,100 30,050 15,025 45,076 22,538 11,269 33,808 16,904

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