The number 57423
57423 is a composite number with 4 divisors. Its prime factorisation is 3 × 19141. Divisors (4): 1, 3, 19141, 57423.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 57423: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 3 × 19141, the product of two primes.
- 2
57423 is composite. Its prime factorisation is
- 3
The divisors add up to 76568; without 57423 itself that is 19145, so 57423 is deficient (19145 is less than 57423). Euler's totient φ(57423) = 38280 numbers up to 57423 share no factor with it.
- 4
The digits of 57423 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 78 steps to reach 1.
LaTeX source of the formulas on this page
\[ 57423 = 3 \times 19141 \]
57423 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 76568 |
| Euler totient φ(n) | 38280 |
| Square | 3297400929 |
| Cube | 189346653545967 |
| Square root | 239.630966 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 78 |
| Scientific notation | 5.7423 × |
57423 in other forms
| Form | Value |
|---|---|
| In words | fifty-seven thousand four hundred and twenty-three |
| Binary (base 2) | 1110000001001111 |
| Octal (base 8) | 160117 |
| Hexadecimal (base 16) | E04F |
| Base 3 | 2220202210 |
| As time | 57423 seconds = 15 h 57 min 3 s |
Is 57423 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 | Yes (57423 ÷ 3 = 19141) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 57423 a prime number?
No. 57423 = 3 × 19141, so it is divisible by 3.
What are the factors of 57423?
1, 3, 19141, 57423.
What is 57423 in binary?
1110000001001111 (hexadecimal E04F, octal 160117).
What is the square root of 57423?
About 239.6310.
Is 57423 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 57423?
57423 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 3 × 19141, the product of two primes.