λ
Sequence Observatory

1,531,708

22 × 23 × 16649
Deficient Even Composite

Starting at 1,531,708, the Collatz iteration reaches 1 after 181 steps. The first transition is 765854; the starting value is even with 12 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 23 × 16649
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 12
Divisor Sum (σ) 2,797,200
Proper Divisor Sum 1,265,492
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #1531697 ← → #1531709

Radix Representation

Decimal 1531708
Binary 101110101111100111100 (21 bits)
Octal 0o5657474
Hexadecimal 0x175F3C

Divisor Catalog (12)

1 2 4 23 46 92 16,649 33,298 66,596 382,927 765,854 1,531,708

Collatz Trajectory (181 steps to reach 1)

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

1,531,708 765,854 382,927 1,148,782 574,391 1,723,174 861,587 2,584,762 1,292,381 3,877,144 1,938,572 969,286 484,643 1,453,930 726,965 2,180,896 1,090,448 545,224 272,612 136,306 68,153 204,460 102,230 51,115 153,346 76,673 230,020 115,010 57,505 172,516 86,258 43,129 129,388 64,694 32,347 97,042 48,521 145,564 72,782 36,391 109,174 54,587 163,762 81,881 245,644 122,822 61,411 184,234 92,117 276,352 138,176 69,088 34,544 17,272 8,636 4,318 2,159 6,478 3,239 9,718

More profiles

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