4005 is an integer, a specific number within the infinite sequence. It holds a unique position, often used as a count or a designation.
It is notably the 89th [triangular number](/wiki/Triangular Number), meaning it is the sum of the first 89 natural numbers (1 + 2 + ... + 89). Its prime factorization is 32 × 5 × 89, indicating it is a [composite number](/wiki/Composite Number). It is also notable for being close to the [prime number](/wiki/Prime Number) 4007.
See also
- [Triangular Number](/wiki/Triangular Number)
- [Prime Factor](/wiki/Prime Factor)
- [Composite Number](/wiki/Composite Number)
- Integer
- [Prime Number](/wiki/Prime Number)
