λ
Sigma Notebook

1,281,823

1281823
Deficient Odd Prime

1,281,823 is odd and not a perfect square. Its factorization is 1281823 and its 2 divisors sum to 1,281,824.

Prime Factor Structure

Factorization String 1281823
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 1,281,824
Proper Divisor Sum 1
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #1281821 ← → #1281827

Radix Representation

Decimal 1281823
Binary 100111000111100011111 (21 bits)
Octal 0o4707437
Hexadecimal 0x138F1F

Divisor Catalog (2)

1 1,281,823

Collatz Trajectory (124 steps to reach 1)

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

1,281,823 3,845,470 1,922,735 5,768,206 2,884,103 8,652,310 4,326,155 12,978,466 6,489,233 19,467,700 9,733,850 4,866,925 14,600,776 7,300,388 3,650,194 1,825,097 5,475,292 2,737,646 1,368,823 4,106,470 2,053,235 6,159,706 3,079,853 9,239,560 4,619,780 2,309,890 1,154,945 3,464,836 1,732,418 866,209 2,598,628 1,299,314 649,657 1,948,972 974,486 487,243 1,461,730 730,865 2,192,596 1,096,298 548,149 1,644,448 822,224 411,112 205,556 102,778 51,389 154,168 77,084 38,542 19,271 57,814 28,907 86,722 43,361 130,084 65,042 32,521 97,564 48,782

More profiles

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