λ
Sigma Notebook

7,021,645

5 × 659 × 2131
Deficient Odd Composite

7,021,645 is odd and not a perfect square. Its factorization is 5 × 659 × 2131 and its 8 divisors sum to 8,442,720.

Prime Factor Structure

Factorization String 5 × 659 × 2131
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 8,442,720
Proper Divisor Sum 1,421,075
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #7021643 ← → #7021657

Radix Representation

Decimal 7021645
Binary 11010110010010001001101 (23 bits)
Octal 0o32622115
Hexadecimal 0x6B244D

Divisor Catalog (8)

1 5 659 2,131 3,295 10,655 1,404,329 7,021,645

Collatz Trajectory (129 steps to reach 1)

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

7,021,645 21,064,936 10,532,468 5,266,234 2,633,117 7,899,352 3,949,676 1,974,838 987,419 2,962,258 1,481,129 4,443,388 2,221,694 1,110,847 3,332,542 1,666,271 4,998,814 2,499,407 7,498,222 3,749,111 11,247,334 5,623,667 16,871,002 8,435,501 25,306,504 12,653,252 6,326,626 3,163,313 9,489,940 4,744,970 2,372,485 7,117,456 3,558,728 1,779,364 889,682 444,841 1,334,524 667,262 333,631 1,000,894 500,447 1,501,342 750,671 2,252,014 1,126,007 3,378,022 1,689,011 5,067,034 2,533,517 7,600,552 3,800,276 1,900,138 950,069 2,850,208 1,425,104 712,552 356,276 178,138 89,069 267,208

More profiles

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