λ
Sequence Observatory

7,878,641

7878641
Deficient Odd Prime

Starting at 7,878,641, the Collatz iteration reaches 1 after 173 steps. The first transition is 23635924; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 7878641
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 7,878,642
Proper Divisor Sum 1
Digit Sum / Digital Root 41 (Root: 5)
Adjacent Primes #7878613 ← → #7878643

Radix Representation

Decimal 7878641
Binary 11110000011011111110001 (23 bits)
Octal 0o36033761
Hexadecimal 0x7837F1

Divisor Catalog (2)

Collatz Trajectory (173 steps to reach 1)

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

7,878,641 23,635,924 11,817,962 5,908,981 17,726,944 8,863,472 4,431,736 2,215,868 1,107,934 553,967 1,661,902 830,951 2,492,854 1,246,427 3,739,282 1,869,641 5,608,924 2,804,462 1,402,231 4,206,694 2,103,347 6,310,042 3,155,021 9,465,064 4,732,532 2,366,266 1,183,133 3,549,400 1,774,700 887,350 443,675 1,331,026 665,513 1,996,540 998,270 499,135 1,497,406 748,703 2,246,110 1,123,055 3,369,166 1,684,583 5,053,750 2,526,875 7,580,626 3,790,313 11,370,940 5,685,470 2,842,735 8,528,206 4,264,103 12,792,310 6,396,155 19,188,466 9,594,233 28,782,700 14,391,350 7,195,675 21,587,026 10,793,513

More profiles

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