1,216,772

2² × 304193

Starting at 1,216,772, the Collatz iteration reaches 1 after 116 steps. The first transition is 608386; the starting value is even with 6 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 304193

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 2,129,358

Proper Divisor Sum 912,586

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #1216763 ← → #1216777

Radix Representation

Decimal	1216772
Binary	100101001000100000100 (21 bits)
Octal	0o4510404
Hexadecimal	0x129104

Divisor Catalog (6)

1 2 4 304,193 608,386 1,216,772

Collatz Trajectory (116 steps to reach 1)

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

1,216,772 608,386 304,193 912,580 456,290 228,145 684,436 342,218 171,109 513,328 256,664 128,332 64,166 32,083 96,250 48,125 144,376 72,188 36,094 18,047 54,142 27,071 81,214 40,607 121,822 60,911 182,734 91,367 274,102 137,051 411,154 205,577 616,732 308,366 154,183 462,550 231,275 693,826 346,913 1,040,740 520,370 260,185 780,556 390,278 195,139 585,418 292,709 878,128 439,064 219,532 109,766 54,883 164,650 82,325 246,976 123,488 61,744 30,872 15,436 7,718

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