1,621,067

7² × 33083

1,621,067 has digital root 5. The neighboring primes are 1621049 and 1621079; its proper-divisor sum differs from the starting integer by -1,356,346.

Prime Factor Structure

Factorization String 7^2 × 33083

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 1,885,788

Proper Divisor Sum 264,721

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #1621049 ← → #1621079

Radix Representation

Decimal	1621067
Binary	110001011110001001011 (21 bits)
Octal	0o6136113
Hexadecimal	0x18BC4B

Divisor Catalog (6)

1 7 49 33,083 231,581 1,621,067

Collatz Trajectory (145 steps to reach 1)

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

1,621,067 4,863,202 2,431,601 7,294,804 3,647,402 1,823,701 5,471,104 2,735,552 1,367,776 683,888 341,944 170,972 85,486 42,743 128,230 64,115 192,346 96,173 288,520 144,260 72,130 36,065 108,196 54,098 27,049 81,148 40,574 20,287 60,862 30,431 91,294 45,647 136,942 68,471 205,414 102,707 308,122 154,061 462,184 231,092 115,546 57,773 173,320 86,660 43,330 21,665 64,996 32,498 16,249 48,748 24,374 12,187 36,562 18,281 54,844 27,422 13,711 41,134 20,567 61,702

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