The number 97421
97421 is a composite number with 4 divisors. Its prime factorisation is 37 × 2633. Divisors (4): 1, 37, 2633, 97421.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 97421: a semiprime: 37 × 2633, the product of two primes.
- 2
97421 is composite. Its prime factorisation is
- 3
The divisors add up to 100092; without 97421 itself that is 2671, so 97421 is deficient (2671 is less than 97421). Euler's totient φ(97421) = 94752 numbers up to 97421 share no factor with it.
- 4
The digits of 97421 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 66 steps to reach 1.
LaTeX source of the formulas on this page
\[ 97421 = 37 \times 2633 \]
97421 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 100092 |
| Euler totient φ(n) | 94752 |
| Square | 9490851241 |
| Cube | 924608218749461 |
| Square root | 312.123373 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 66 |
| Scientific notation | 9.7421 × |
97421 in other forms
| Form | Value |
|---|---|
| In words | ninety-seven thousand four hundred and twenty-one |
| Binary (base 2) | 10111110010001101 |
| Octal (base 8) | 276215 |
| Hexadecimal (base 16) | 17C8D |
| Base 3 | 11221122012 |
| As time | 97421 seconds = 27 h 3 min 41 s |
Is 97421 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 | No (remainder 2) | 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 5) | 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 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | 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 97421 a prime number?
No. 97421 = 37 × 2633, so it is divisible by 37.
What are the factors of 97421?
1, 37, 2633, 97421.
What is 97421 in binary?
10111110010001101 (hexadecimal 17C8D, octal 276215).
What is the square root of 97421?
About 312.1234.
Is 97421 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 97421?
97421 is a semiprime: 37 × 2633, the product of two primes.