λ
Sigma Notebook

1,320,421

1320421
Deficient Odd Prime

1,320,421 is odd and not a perfect square. Its factorization is 1320421 and its 2 divisors sum to 1,320,422.

Prime Factor Structure

Factorization String 1320421
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 1,320,422
Proper Divisor Sum 1
Digit Sum / Digital Root 13 (Root: 4)
Adjacent Primes #1320413 ← → #1320427

Radix Representation

Decimal 1320421
Binary 101000010010111100101 (21 bits)
Octal 0o5022745
Hexadecimal 0x1425E5

Divisor Catalog (2)

Collatz Trajectory (230 steps to reach 1)

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

1,320,421 3,961,264 1,980,632 990,316 495,158 247,579 742,738 371,369 1,114,108 557,054 278,527 835,582 417,791 1,253,374 626,687 1,880,062 940,031 2,820,094 1,410,047 4,230,142 2,115,071 6,345,214 3,172,607 9,517,822 4,758,911 14,276,734 7,138,367 21,415,102 10,707,551 32,122,654 16,061,327 48,183,982 24,091,991 72,275,974 36,137,987 108,413,962 54,206,981 162,620,944 81,310,472 40,655,236 20,327,618 10,163,809 30,491,428 15,245,714 7,622,857 22,868,572 11,434,286 5,717,143 17,151,430 8,575,715 25,727,146 12,863,573 38,590,720 19,295,360 9,647,680 4,823,840 2,411,920 1,205,960 602,980 301,490

More profiles

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