The number 29425
29425 is a composite number with 12 divisors. Its prime factorisation is × 11 × 107. Divisors (12): 1, 5, 11, 25, 55, 107, 275, 535, 1177, 2675, 5885, 29425.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 29425: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
29425 is composite. Its prime factorisation is
- 3
The divisors add up to 40176; without 29425 itself that is 10751, so 29425 is deficient (10751 is less than 29425). Euler's totient φ(29425) = 21200 numbers up to 29425 share no factor with it.
- 4
The digits of 29425 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 134 steps to reach 1.
LaTeX source of the formulas on this page
\[ 29425 = 5^{2} \times 11 \times 107 \]29425 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 40176 |
| Euler totient φ(n) | 21200 |
| Square | 865830625 |
| Cube | 25477066140625 |
| Square root | 171.537168 (= 5√1177) |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 134 |
| Scientific notation | 2.9425 × |
29425 in other forms
| Form | Value |
|---|---|
| In words | twenty-nine thousand four hundred and twenty-five |
| Binary (base 2) | 111001011110001 |
| Octal (base 8) | 71361 |
| Hexadecimal (base 16) | 72F1 |
| Base 3 | 1111100211 |
| As time | 29425 seconds = 8 h 10 min 25 s |
Is 29425 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 | Yes (29425 ÷ 5 = 5885) | 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 | No (remainder 4) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (29425 ÷ 11 = 2675) | 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 29425 a prime number?
No. 29425 = × 11 × 107, so it is divisible by 5.
What are the factors of 29425?
1, 5, 11, 25, 55, 107, 275, 535, 1177, 2675, 5885, 29425.
What is 29425 in binary?
111001011110001 (hexadecimal 72F1, octal 71361).
What is the square root of 29425?
About 171.5372, exactly 5√1177.
Is 29425 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 29425?
29425 is a happy number: repeatedly adding the squares of its digits reaches 1.