λ
Sequence Observatory

120,455

5 × 24091
Deficient Odd Composite

Starting at 120,455, the Collatz iteration reaches 1 after 92 steps. The first transition is 361366; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 5 × 24091
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 144,552
Proper Divisor Sum 24,097
Digit Sum / Digital Root 17 (Root: 8)
Adjacent Primes #120431 ← → #120473

Radix Representation

Decimal 120455
Binary 11101011010000111 (17 bits)
Octal 0o353207
Hexadecimal 0x1D687

Divisor Catalog (4)

1 5 24,091 120,455

Collatz Trajectory (92 steps to reach 1)

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

120,455 361,366 180,683 542,050 271,025 813,076 406,538 203,269 609,808 304,904 152,452 76,226 38,113 114,340 57,170 28,585 85,756 42,878 21,439 64,318 32,159 96,478 48,239 144,718 72,359 217,078 108,539 325,618 162,809 488,428 244,214 122,107 366,322 183,161 549,484 274,742 137,371 412,114 206,057 618,172 309,086 154,543 463,630 231,815 695,446 347,723 1,043,170 521,585 1,564,756 782,378 391,189 1,173,568 586,784 293,392 146,696 73,348 36,674 18,337 55,012 27,506

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