λ
Sequence Observatory

2,550,139

2550139
Deficient Odd Prime

Starting at 2,550,139, the Collatz iteration reaches 1 after 86 steps. The first transition is 7650418; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 2550139
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 2,550,140
Proper Divisor Sum 1
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #2550133 ← → #2550167

Radix Representation

Decimal 2550139
Binary 1001101110100101111011 (22 bits)
Octal 0o11564573
Hexadecimal 0x26E97B

Divisor Catalog (2)

Collatz Trajectory (86 steps to reach 1)

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

2,550,139 7,650,418 3,825,209 11,475,628 5,737,814 2,868,907 8,606,722 4,303,361 12,910,084 6,455,042 3,227,521 9,682,564 4,841,282 2,420,641 7,261,924 3,630,962 1,815,481 5,446,444 2,723,222 1,361,611 4,084,834 2,042,417 6,127,252 3,063,626 1,531,813 4,595,440 2,297,720 1,148,860 574,430 287,215 861,646 430,823 1,292,470 646,235 1,938,706 969,353 2,908,060 1,454,030 727,015 2,181,046 1,090,523 3,271,570 1,635,785 4,907,356 2,453,678 1,226,839 3,680,518 1,840,259 5,520,778 2,760,389 8,281,168 4,140,584 2,070,292 1,035,146 517,573 1,552,720 776,360 388,180 194,090 97,045

More profiles

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