690,121

401 × 1721

For 690,121, the 4 positive divisors have a total of 692,244. Removing 690,121 leaves 2,123, which gives the deficient classification.

Prime Factor Structure

Factorization String 401 × 1721

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 692,244

Proper Divisor Sum 2,123

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #690119 ← → #690127

Radix Representation

Decimal	690121
Binary	10101000011111001001 (20 bits)
Octal	0o2503711
Hexadecimal	0xA87C9

Divisor Catalog (4)

1 401 1,721 690,121

Collatz Trajectory (79 steps to reach 1)

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

690,121 2,070,364 1,035,182 517,591 1,552,774 776,387 2,329,162 1,164,581 3,493,744 1,746,872 873,436 436,718 218,359 655,078 327,539 982,618 491,309 1,473,928 736,964 368,482 184,241 552,724 276,362 138,181 414,544 207,272 103,636 51,818 25,909 77,728 38,864 19,432 9,716 4,858 2,429 7,288 3,644 1,822 911 2,734 1,367 4,102 2,051 6,154 3,077 9,232 4,616 2,308 1,154 577 1,732 866 433 1,300 650 325 976 488 244 122

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