1000001 is the number following 1000000 and preceding 1000002.
Properties[]
- Its factors are 1, 101, 9901 and 1000001, making it a composite number.[1][2][3] It is also a squarefree number.[4]
- 1000001 is an odd number[5][6] .
- 1000001 is an unhappy number.[7][8]
- 1000001 is deficient.[9]
- Its prime factorization is 1011 × 99011.
- 1000001 is a palindromic number, meaning it is the same forwards and reverse.[10][11]
Approximations[]
| Notation | Lower bound | Upper bound | |
|---|---|---|---|
| Up-arrow notation | 1000 ↑ 2 | ||
| Scientific notation | 1 x 106 | ||
| Slow-growing hierarchy | \(g_{\omega^{\omega}}(7)\) | \(g_{\omega^{\omega}}(8)\) | |
| Chained arrow notation | 1000 → 2 | ||
| Bowers' Exploding Array Function/Bird's array notation | {1000,2} | ||
| Hardy hierarchy | Hω(500000) | Hω(500001) | |
| Middle-growing hierarchy | m(ω,19) | ||
| Hyper-E notation | E6 | ||
| Hyper-E notation (non-10 base) | \(E[1000]2\) | ||
| X-Sequence Hyper-Exponential Notation | 1000{1}2 | ||
| PlantStar's Debut Notation | [3] | [4] | |
| H* function | H(1) | H(1.1) | |
| Bashicu matrix system with respect to version 4 | (0)[1000] | (0)[1001] | |
Sources[]
- ↑ OEIS A002808 - Composite numbers
- ↑ Wolfram Alpha Is 1000001 composite?
- ↑ Wolfram Alpha 1000001's factors
- ↑ OEIS A005117 - Squarefree numbers
- ↑ OEIS A005408 - Odd numbers
- ↑ Wolfram Alpha Is 1000001 odd?
- ↑ Wolfram Alpha Unhappy Numbers
- ↑ OEIS A031177 - Unhappy Numbers
- ↑ OEIS A005100 - Deficient numbers
- ↑ Wolfram Alpha Is 1000001 a palindrome?
- ↑ OEIS A002113 - Palindromes