The number 57421
57421 is a composite number with 8 divisors. Its prime factorisation is 7 × 13 × 631. Divisors (8): 1, 7, 13, 91, 631, 4417, 8203, 57421.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
57421 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
57421 is composite. Its prime factorisation is
- 3
The divisors add up to 70784; without 57421 itself that is 13363, so 57421 is deficient (13363 is less than 57421). Euler's totient φ(57421) = 45360 numbers up to 57421 share no factor with it.
- 4
The digits of 57421 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 78 steps to reach 1.
LaTeX source of the formulas on this page
\[ 57421 = 7 \times 13 \times 631 \]
57421 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 70784 |
| Euler totient φ(n) | 45360 |
| Square | 3297171241 |
| Cube | 189326869829461 |
| Square root | 239.626793 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 78 |
| Scientific notation | 5.7421 × |
57421 in other forms
| Form | Value |
|---|---|
| In words | fifty-seven thousand four hundred and twenty-one |
| Binary (base 2) | 1110000001001101 |
| Octal (base 8) | 160115 |
| Hexadecimal (base 16) | E04D |
| Base 3 | 2220202201 |
| As time | 57421 seconds = 15 h 57 min 1 s |
Is 57421 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 1) | 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 | Yes (57421 ÷ 7 = 8203) | 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 1) | 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 1) | 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 57421 a prime number?
No. 57421 = 7 × 13 × 631, so it is divisible by 7.
What are the factors of 57421?
1, 7, 13, 91, 631, 4417, 8203, 57421.
What is 57421 in binary?
1110000001001101 (hexadecimal E04D, octal 160115).
What is the square root of 57421?
About 239.6268.
Is 57421 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 57421?
It is a composite number with 8 divisors.