λ
Sequence Observatory

2,123,669

2123669
Deficient Odd Prime

Starting at 2,123,669, the Collatz iteration reaches 1 after 104 steps. The first transition is 6371008; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 2123669
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 2,123,670
Proper Divisor Sum 1
Digit Sum / Digital Root 29 (Root: 2)
Adjacent Primes #2123663 ← → #2123683

Radix Representation

Decimal 2123669
Binary 1000000110011110010101 (22 bits)
Octal 0o10063625
Hexadecimal 0x206795

Divisor Catalog (2)

Collatz Trajectory (104 steps to reach 1)

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

2,123,669 6,371,008 3,185,504 1,592,752 796,376 398,188 199,094 99,547 298,642 149,321 447,964 223,982 111,991 335,974 167,987 503,962 251,981 755,944 377,972 188,986 94,493 283,480 141,740 70,870 35,435 106,306 53,153 159,460 79,730 39,865 119,596 59,798 29,899 89,698 44,849 134,548 67,274 33,637 100,912 50,456 25,228 12,614 6,307 18,922 9,461 28,384 14,192 7,096 3,548 1,774 887 2,662 1,331 3,994 1,997 5,992 2,996 1,498 749 2,248

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