The number 25426
25426 is a composite number with 4 divisors. Its prime factorisation is 2 × 12713. Divisors (4): 1, 2, 12713, 25426.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 25426: a semiprime: 2 × 12713, the product of two primes.
- 2
25426 is composite. Its prime factorisation is
- 3
The divisors add up to 38142; without 25426 itself that is 12716, so 25426 is deficient (12716 is less than 25426). Euler's totient φ(25426) = 12712 numbers up to 25426 share no factor with it.
- 4
The digits of 25426 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 108 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25426 = 2 \times 12713 \]
25426 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 38142 |
| Euler totient φ(n) | 12712 |
| Square | 646481476 |
| Cube | 16437438008776 |
| Square root | 159.455323 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 108 |
| Scientific notation | 2.5426 × |
25426 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand four hundred and twenty-six |
| Binary (base 2) | 110001101010010 |
| Octal (base 8) | 61522 |
| Hexadecimal (base 16) | 6352 |
| Base 3 | 1021212201 |
| As time | 25426 seconds = 7 h 3 min 46 s |
Is 25426 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (25426 ÷ 2 = 12713) | 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 2) | 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 4) | 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 2) | 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 6) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 25426 a prime number?
No. 25426 = 2 × 12713, so it is divisible by 2.
What are the factors of 25426?
1, 2, 12713, 25426.
What is 25426 in binary?
110001101010010 (hexadecimal 6352, octal 61522).
What is the square root of 25426?
About 159.4553.
Is 25426 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 25426?
25426 is a semiprime: 2 × 12713, the product of two primes.