λ
Sequence Observatory

1,587,812

22 × 396953
Deficient Even Composite

Starting at 1,587,812, the Collatz iteration reaches 1 after 145 steps. The first transition is 793906; the starting value is even with 6 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 396953
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 6
Divisor Sum (σ) 2,778,678
Proper Divisor Sum 1,190,866
Digit Sum / Digital Root 32 (Root: 5)
Adjacent Primes #1587809 ← → #1587829

Radix Representation

Decimal 1587812
Binary 110000011101001100100 (21 bits)
Octal 0o6035144
Hexadecimal 0x183A64

Divisor Catalog (6)

1 2 4 396,953 793,906 1,587,812

Collatz Trajectory (145 steps to reach 1)

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

1,587,812 793,906 396,953 1,190,860 595,430 297,715 893,146 446,573 1,339,720 669,860 334,930 167,465 502,396 251,198 125,599 376,798 188,399 565,198 282,599 847,798 423,899 1,271,698 635,849 1,907,548 953,774 476,887 1,430,662 715,331 2,145,994 1,072,997 3,218,992 1,609,496 804,748 402,374 201,187 603,562 301,781 905,344 452,672 226,336 113,168 56,584 28,292 14,146 7,073 21,220 10,610 5,305 15,916 7,958 3,979 11,938 5,969 17,908 8,954 4,477 13,432 6,716 3,358 1,679

More profiles

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