The number 25142
25142 is a composite number with 8 divisors. Its prime factorisation is 2 × 13 × 967. Divisors (8): 1, 2, 13, 26, 967, 1934, 12571, 25142.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
25142 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
25142 is composite. Its prime factorisation is
- 3
The divisors add up to 40656; without 25142 itself that is 15514, so 25142 is deficient (15514 is less than 25142). Euler's totient φ(25142) = 11592 numbers up to 25142 share no factor with it.
- 4
The digits of 25142 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 64 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25142 = 2 \times 13 \times 967 \]
25142 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 40656 |
| Euler totient φ(n) | 11592 |
| Square | 632120164 |
| Cube | 15892765163288 |
| Square root | 158.562291 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 64 |
| Scientific notation | 2.5142 × |
25142 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand one hundred and forty-two |
| Binary (base 2) | 110001000110110 |
| Octal (base 8) | 61066 |
| Hexadecimal (base 16) | 6236 |
| Base 3 | 1021111012 |
| As time | 25142 seconds = 6 h 59 min 2 s |
Is 25142 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (25142 ÷ 2 = 12571) | 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 2) | 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 6) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 25142 a prime number?
No. 25142 = 2 × 13 × 967, so it is divisible by 2.
What are the factors of 25142?
1, 2, 13, 26, 967, 1934, 12571, 25142.
What is 25142 in binary?
110001000110110 (hexadecimal 6236, octal 61066).
What is the square root of 25142?
About 158.5623.
Is 25142 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 25142?
It is a composite number with 8 divisors.