The number 97142
97142 is a composite number with 4 divisors. Its prime factorisation is 2 × 48571. Divisors (4): 1, 2, 48571, 97142.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 97142: a semiprime: 2 × 48571, the product of two primes.
- 2
97142 is composite. Its prime factorisation is
- 3
The divisors add up to 145716; without 97142 itself that is 48574, so 97142 is deficient (48574 is less than 97142). Euler's totient φ(97142) = 48570 numbers up to 97142 share no factor with it.
- 4
The digits of 97142 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 53 steps to reach 1.
LaTeX source of the formulas on this page
\[ 97142 = 2 \times 48571 \]
97142 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 145716 |
| Euler totient φ(n) | 48570 |
| Square | 9436568164 |
| Cube | 916687104587288 |
| Square root | 311.676114 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 53 |
| Scientific notation | 9.7142 × |
97142 in other forms
| Form | Value |
|---|---|
| In words | ninety-seven thousand one hundred and forty-two |
| Binary (base 2) | 10111101101110110 |
| Octal (base 8) | 275566 |
| Hexadecimal (base 16) | 17B76 |
| Base 3 | 11221020212 |
| As time | 97142 seconds = 26 h 59 min 2 s |
Is 97142 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (97142 ÷ 2 = 48571) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 97142 a prime number?
No. 97142 = 2 × 48571, so it is divisible by 2.
What are the factors of 97142?
1, 2, 48571, 97142.
What is 97142 in binary?
10111101101110110 (hexadecimal 17B76, octal 275566).
What is the square root of 97142?
About 311.6761.
Is 97142 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 97142?
97142 is a semiprime: 2 × 48571, the product of two primes.