The number 25427
25427 is a composite number with 4 divisors. Its prime factorisation is 47 × 541. Divisors (4): 1, 47, 541, 25427.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 25427: a semiprime: 47 × 541, the product of two primes.
- 2
25427 is composite. Its prime factorisation is
- 3
The divisors add up to 26016; without 25427 itself that is 589, so 25427 is deficient (589 is less than 25427). Euler's totient φ(25427) = 24840 numbers up to 25427 share no factor with it.
- 4
The digits of 25427 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 108 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25427 = 47 \times 541 \]
25427 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 26016 |
| Euler totient φ(n) | 24840 |
| Square | 646532329 |
| Cube | 16439377529483 |
| Square root | 159.458459 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 108 |
| Scientific notation | 2.5427 × |
25427 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand four hundred and twenty-seven |
| Binary (base 2) | 110001101010011 |
| Octal (base 8) | 61523 |
| Hexadecimal (base 16) | 6353 |
| Base 3 | 1021212202 |
| As time | 25427 seconds = 7 h 3 min 47 s |
Is 25427 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 3) | 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 5) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 25427 a prime number?
No. 25427 = 47 × 541, so it is divisible by 47.
What are the factors of 25427?
1, 47, 541, 25427.
What is 25427 in binary?
110001101010011 (hexadecimal 6353, octal 61523).
What is the square root of 25427?
About 159.4585.
Is 25427 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 25427?
25427 is a semiprime: 47 × 541, the product of two primes.