The number 42670
42670 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 17 × 251. Divisors (16): 1, 2, 5, 10, 17, 34, 85, 170, 251, 502, 1255, 2510, 4267, 8534, 21335, 42670.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42670 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42670 is composite. Its prime factorisation is
- 3
The divisors add up to 81648; without 42670 itself that is 38978, so 42670 is deficient (38978 is less than 42670). Euler's totient φ(42670) = 16000 numbers up to 42670 share no factor with it.
- 4
The digits of 42670 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 150 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42670 = 2 \times 5 \times 17 \times 251 \]
42670 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 81648 |
| Euler totient φ(n) | 16000 |
| Square | 1820728900 |
| Cube | 77690502163000 |
| Square root | 206.567180 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 150 |
| Scientific notation | 4.267 × |
42670 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand six hundred and seventy |
| Binary (base 2) | 1010011010101110 |
| Octal (base 8) | 123256 |
| Hexadecimal (base 16) | A6AE |
| Base 3 | 2011112101 |
| As time | 42670 seconds = 11 h 51 min 10 s |
Is 42670 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42670 ÷ 2 = 21335) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (42670 ÷ 5 = 8534) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 6) | 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 | Yes (42670 ÷ 10 = 4267) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42670 a prime number?
No. 42670 = 2 × 5 × 17 × 251, so it is divisible by 2.
What are the factors of 42670?
1, 2, 5, 10, 17, 34, 85, 170, 251, 502, 1255, 2510, 4267, 8534, 21335, 42670.
What is 42670 in binary?
1010011010101110 (hexadecimal A6AE, octal 123256).
What is the square root of 42670?
About 206.5672.
Is 42670 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 42670?
It is a composite number with 16 divisors.