The number 42913
42913 is a composite number with 4 divisors. Its prime factorisation is 13 × 3301. Divisors (4): 1, 13, 3301, 42913.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42913: a semiprime: 13 × 3301, the product of two primes.
- 2
42913 is composite. Its prime factorisation is
- 3
The divisors add up to 46228; without 42913 itself that is 3315, so 42913 is deficient (3315 is less than 42913). Euler's totient φ(42913) = 39600 numbers up to 42913 share no factor with it.
- 4
The digits of 42913 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42913 = 13 \times 3301 \]
42913 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 46228 |
| Euler totient φ(n) | 39600 |
| Square | 1841525569 |
| Cube | 79025386742497 |
| Square root | 207.154532 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2913 × |
42913 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand nine hundred and thirteen |
| Binary (base 2) | 1010011110100001 |
| Octal (base 8) | 123641 |
| Hexadecimal (base 16) | A7A1 |
| Base 3 | 2011212101 |
| As time | 42913 seconds = 11 h 55 min 13 s |
Is 42913 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 1) | 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 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | 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 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42913 a prime number?
No. 42913 = 13 × 3301, so it is divisible by 13.
What are the factors of 42913?
1, 13, 3301, 42913.
What is 42913 in binary?
1010011110100001 (hexadecimal A7A1, octal 123641).
What is the square root of 42913?
About 207.1545.
Is 42913 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 42913?
42913 is a semiprime: 13 × 3301, the product of two primes.