1,292,398

2 × 646199

Starting at 1,292,398, the Collatz iteration reaches 1 after 111 steps. The first transition is 646199; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 646199

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,938,600

Proper Divisor Sum 646,202

Digit Sum / Digital Root 34 (Root: 7)

Adjacent Primes #1292387 ← → #1292419

Radix Representation

Decimal	1292398
Binary	100111011100001101110 (21 bits)
Octal	0o4734156
Hexadecimal	0x13B86E

Divisor Catalog (4)

1 2 646,199 1,292,398

Collatz Trajectory (111 steps to reach 1)

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

1,292,398 646,199 1,938,598 969,299 2,907,898 1,453,949 4,361,848 2,180,924 1,090,462 545,231 1,635,694 817,847 2,453,542 1,226,771 3,680,314 1,840,157 5,520,472 2,760,236 1,380,118 690,059 2,070,178 1,035,089 3,105,268 1,552,634 776,317 2,328,952 1,164,476 582,238 291,119 873,358 436,679 1,310,038 655,019 1,965,058 982,529 2,947,588 1,473,794 736,897 2,210,692 1,105,346 552,673 1,658,020 829,010 414,505 1,243,516 621,758 310,879 932,638 466,319 1,398,958 699,479 2,098,438 1,049,219 3,147,658 1,573,829 4,721,488 2,360,744 1,180,372 590,186 295,093

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