1,221,631

1221631

1,221,631 factors as 1221631. Its 2 positive divisors give a proper-divisor sum of 1, so this integer is deficient. The Collatz stopping time is 266 steps.

Prime Factor Structure

Factorization String 1221631

Distinct Prime Factors 1

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 2

Divisor Sum (σ) 1,221,632

Proper Divisor Sum 1

Digit Sum / Digital Root 16 (Root: 7)

Adjacent Primes #1221601 ← → #1221641

Radix Representation

Decimal	1221631
Binary	100101010001111111111 (21 bits)
Octal	0o4521777
Hexadecimal	0x12A3FF

Divisor Catalog (2)

1 1,221,631

Collatz Trajectory (266 steps to reach 1)

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

1,221,631 3,664,894 1,832,447 5,497,342 2,748,671 8,246,014 4,123,007 12,369,022 6,184,511 18,553,534 9,276,767 27,830,302 13,915,151 41,745,454 20,872,727 62,618,182 31,309,091 93,927,274 46,963,637 140,890,912 70,445,456 35,222,728 17,611,364 8,805,682 4,402,841 13,208,524 6,604,262 3,302,131 9,906,394 4,953,197 14,859,592 7,429,796 3,714,898 1,857,449 5,572,348 2,786,174 1,393,087 4,179,262 2,089,631 6,268,894 3,134,447 9,403,342 4,701,671 14,105,014 7,052,507 21,157,522 10,578,761 31,736,284 15,868,142 7,934,071 23,802,214 11,901,107 35,703,322 17,851,661 53,554,984 26,777,492 13,388,746 6,694,373 20,083,120 10,041,560

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