1,155,215

5 × 29 × 31 × 257

1,155,215 factors as 5 × 29 × 31 × 257. Its 16 positive divisors give a proper-divisor sum of 330,865, so this integer is deficient. The Collatz stopping time is 160 steps.

Prime Factor Structure

Factorization String 5 × 29 × 31 × 257

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 1,486,080

Proper Divisor Sum 330,865

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #1155211 ← → #1155223

Radix Representation

Decimal	1155215
Binary	100011010000010001111 (21 bits)
Octal	0o4320217
Hexadecimal	0x11A08F

Divisor Catalog (16)

1 5 29 31 145 155 257 899 1,285 4,495 7,453 7,967 37,265 39,835 231,043 1,155,215

Collatz Trajectory (160 steps to reach 1)

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

1,155,215 3,465,646 1,732,823 5,198,470 2,599,235 7,797,706 3,898,853 11,696,560 5,848,280 2,924,140 1,462,070 731,035 2,193,106 1,096,553 3,289,660 1,644,830 822,415 2,467,246 1,233,623 3,700,870 1,850,435 5,551,306 2,775,653 8,326,960 4,163,480 2,081,740 1,040,870 520,435 1,561,306 780,653 2,341,960 1,170,980 585,490 292,745 878,236 439,118 219,559 658,678 329,339 988,018 494,009 1,482,028 741,014 370,507 1,111,522 555,761 1,667,284 833,642 416,821 1,250,464 625,232 312,616 156,308 78,154 39,077 117,232 58,616 29,308 14,654 7,327

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