2,543,140

2² × 5 × 127157

Starting at 2,543,140, the Collatz iteration reaches 1 after 174 steps. The first transition is 1271570; the starting value is even with 12 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 5 × 127157

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 5,340,636

Proper Divisor Sum 2,797,496

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #2543129 ← → #2543141

Radix Representation

Decimal	2543140
Binary	1001101100111000100100 (22 bits)
Octal	0o11547044
Hexadecimal	0x26CE24

Divisor Catalog (12)

1 2 4 5 10 20 127,157 254,314 508,628 635,785 1,271,570 2,543,140

Collatz Trajectory (174 steps to reach 1)

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

2,543,140 1,271,570 635,785 1,907,356 953,678 476,839 1,430,518 715,259 2,145,778 1,072,889 3,218,668 1,609,334 804,667 2,414,002 1,207,001 3,621,004 1,810,502 905,251 2,715,754 1,357,877 4,073,632 2,036,816 1,018,408 509,204 254,602 127,301 381,904 190,952 95,476 47,738 23,869 71,608 35,804 17,902 8,951 26,854 13,427 40,282 20,141 60,424 30,212 15,106 7,553 22,660 11,330 5,665 16,996 8,498 4,249 12,748 6,374 3,187 9,562 4,781 14,344 7,172 3,586 1,793 5,380 2,690

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