1,261,556

2² × 315389

1,261,556 factors as 2^2 × 315389. Its 6 positive divisors give a proper-divisor sum of 946,174, so this integer is deficient. The Collatz stopping time is 129 steps.

Prime Factor Structure

Factorization String 2^2 × 315389

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 2,207,730

Proper Divisor Sum 946,174

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #1261549 ← → #1261567

Radix Representation

Decimal	1261556
Binary	100110011111111110100 (21 bits)
Octal	0o4637764
Hexadecimal	0x133FF4

Divisor Catalog (6)

1 2 4 315,389 630,778 1,261,556

Collatz Trajectory (129 steps to reach 1)

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

1,261,556 630,778 315,389 946,168 473,084 236,542 118,271 354,814 177,407 532,222 266,111 798,334 399,167 1,197,502 598,751 1,796,254 898,127 2,694,382 1,347,191 4,041,574 2,020,787 6,062,362 3,031,181 9,093,544 4,546,772 2,273,386 1,136,693 3,410,080 1,705,040 852,520 426,260 213,130 106,565 319,696 159,848 79,924 39,962 19,981 59,944 29,972 14,986 7,493 22,480 11,240 5,620 2,810 1,405 4,216 2,108 1,054 527 1,582 791 2,374 1,187 3,562 1,781 5,344 2,672 1,336

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