The number 43001
43001 is a composite number with 4 divisors. Its prime factorisation is 7 × 6143. Divisors (4): 1, 7, 6143, 43001.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43001: a semiprime: 7 × 6143, the product of two primes.
- 2
43001 is composite. Its prime factorisation is
- 3
The divisors add up to 49152; without 43001 itself that is 6151, so 43001 is deficient (6151 is less than 43001). Euler's totient φ(43001) = 36852 numbers up to 43001 share no factor with it.
- 4
The digits of 43001 add up to 8, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 101 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43001 = 7 \times 6143 \]
43001 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 49152 |
| Euler totient φ(n) | 36852 |
| Square | 1849086001 |
| Cube | 79512547129001 |
| Square root | 207.366825 |
| Digit sum / digital root | 8 / 8 |
| Collatz steps to 1 | 101 |
| Scientific notation | 4.3001 × |
43001 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand and one |
| Binary (base 2) | 1010011111111001 |
| Octal (base 8) | 123771 |
| Hexadecimal (base 16) | A7F9 |
| Base 3 | 2011222122 |
| As time | 43001 seconds = 11 h 56 min 41 s |
Is 43001 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (43001 ÷ 7 = 6143) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 43001 a prime number?
No. 43001 = 7 × 6143, so it is divisible by 7.
What are the factors of 43001?
1, 7, 6143, 43001.
What is 43001 in binary?
1010011111111001 (hexadecimal A7F9, octal 123771).
What is the square root of 43001?
About 207.3668.
Is 43001 divisible by 3?
No. Its digits add up to 8, which is not a multiple of 3.
What is special about the number 43001?
43001 is a semiprime: 7 × 6143, the product of two primes.