2,117,865
3 × 5 × 271 × 521
Deficient
Odd
Composite
Starting at 2,117,865, the Collatz iteration reaches 1 after 166 steps. The first transition is 6353596; the starting value is odd with 16 positive divisors.
Resources
Prime Factor Structure
Factorization String
3 × 5 × 271 × 521
Distinct Prime Factors
4
Square Status
No
Abundance Measure
Deficient
Analytical Properties
Total Divisors
16
Divisor Sum (σ)
3,407,616
Proper Divisor Sum
1,289,751
Digit Sum / Digital Root
30 (Root: 3)
Adjacent Primes
#2117861 ← → #2117887
Radix Representation
| Decimal | 2117865 |
| Binary | 1000000101000011101001 (22 bits) |
| Octal | 0o10050351 |
| Hexadecimal | 0x2050E9 |
Divisor Catalog (5 of 16)
Collatz Trajectory (166 steps to reach 1)
Iterative sequence n → n/2 (if even) or 3n+1 (if odd):
Showing the first 5 trajectory entries; the stopping-time total above is unchanged.