1,242,890

2 × 5 × 11 × 11299

Starting at 1,242,890, the Collatz iteration reaches 1 after 111 steps. The first transition is 621445; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2 × 5 × 11 × 11299

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 2,440,800

Proper Divisor Sum 1,197,910

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #1242889 ← → #1242893

Radix Representation

Decimal	1242890
Binary	100101111011100001010 (21 bits)
Octal	0o4573412
Hexadecimal	0x12F70A

Divisor Catalog (16)

1 2 5 10 11 22 55 110 11,299 22,598 56,495 112,990 124,289 248,578 621,445 1,242,890

Collatz Trajectory (111 steps to reach 1)

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

1,242,890 621,445 1,864,336 932,168 466,084 233,042 116,521 349,564 174,782 87,391 262,174 131,087 393,262 196,631 589,894 294,947 884,842 442,421 1,327,264 663,632 331,816 165,908 82,954 41,477 124,432 62,216 31,108 15,554 7,777 23,332 11,666 5,833 17,500 8,750 4,375 13,126 6,563 19,690 9,845 29,536 14,768 7,384 3,692 1,846 923 2,770 1,385 4,156 2,078 1,039 3,118 1,559 4,678 2,339 7,018 3,509 10,528 5,264 2,632 1,316

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