The number 42970
42970 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 4297. Divisors (8): 1, 2, 5, 10, 4297, 8594, 21485, 42970.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42970 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42970 is composite. Its prime factorisation is
- 3
The divisors add up to 77364; without 42970 itself that is 34394, so 42970 is deficient (34394 is less than 42970). Euler's totient φ(42970) = 17184 numbers up to 42970 share no factor with it.
- 4
The digits of 42970 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 132 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42970 = 2 \times 5 \times 4297 \]
42970 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 77364 |
| Euler totient φ(n) | 17184 |
| Square | 1846420900 |
| Cube | 79340706073000 |
| Square root | 207.292064 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 132 |
| Scientific notation | 4.297 × |
42970 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand nine hundred and seventy |
| Binary (base 2) | 1010011111011010 |
| Octal (base 8) | 123732 |
| Hexadecimal (base 16) | A7DA |
| Base 3 | 2011221111 |
| As time | 42970 seconds = 11 h 56 min 10 s |
Is 42970 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42970 ÷ 2 = 21485) | 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 (42970 ÷ 5 = 8594) | 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 4) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (42970 ÷ 10 = 4297) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | 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 42970 a prime number?
No. 42970 = 2 × 5 × 4297, so it is divisible by 2.
What are the factors of 42970?
1, 2, 5, 10, 4297, 8594, 21485, 42970.
What is 42970 in binary?
1010011111011010 (hexadecimal A7DA, octal 123732).
What is the square root of 42970?
About 207.2921.
Is 42970 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 42970?
It is a composite number with 8 divisors.