λ
Sequence Observatory

149,641

151 × 991
Deficient Odd Composite

Starting at 149,641, the Collatz iteration reaches 1 after 232 steps. The first transition is 448924; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 151 × 991
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 150,784
Proper Divisor Sum 1,143
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #149629 ← → #149689

Radix Representation

Decimal 149641
Binary 100100100010001001 (18 bits)
Octal 0o444211
Hexadecimal 0x24889

Divisor Catalog (4)

1 151 991 149,641

Collatz Trajectory (232 steps to reach 1)

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

149,641 448,924 224,462 112,231 336,694 168,347 505,042 252,521 757,564 378,782 189,391 568,174 284,087 852,262 426,131 1,278,394 639,197 1,917,592 958,796 479,398 239,699 719,098 359,549 1,078,648 539,324 269,662 134,831 404,494 202,247 606,742 303,371 910,114 455,057 1,365,172 682,586 341,293 1,023,880 511,940 255,970 127,985 383,956 191,978 95,989 287,968 143,984 71,992 35,996 17,998 8,999 26,998 13,499 40,498 20,249 60,748 30,374 15,187 45,562 22,781 68,344 34,172

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