The number 61138
61138 is a composite number with 16 divisors. Its prime factorisation is 2 × 7 × 11 × 397. Divisors (16): 1, 2, 7, 11, 14, 22, 77, 154, 397, 794, 2779, 4367, 5558, 8734, 30569, 61138.
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How to work it out
- 1
61138 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61138 is composite. Its prime factorisation is
- 3
The divisors add up to 114624; without 61138 itself that is 53486, so 61138 is deficient (53486 is less than 61138). Euler's totient φ(61138) = 23760 numbers up to 61138 share no factor with it.
- 4
The digits of 61138 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 73 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61138 = 2 \times 7 \times 11 \times 397 \]
61138 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 114624 |
| Euler totient φ(n) | 23760 |
| Square | 3737855044 |
| Cube | 228524981680072 |
| Square root | 247.260996 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 73 |
| Scientific notation | 6.1138 × |
61138 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand one hundred and thirty-eight |
| Binary (base 2) | 1110111011010010 |
| Octal (base 8) | 167322 |
| Hexadecimal (base 16) | EED2 |
| Base 3 | 10002212101 |
| As time | 61138 seconds = 16 h 58 min 58 s |
Is 61138 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (61138 ÷ 2 = 30569) | 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 3) | 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 | Yes (61138 ÷ 7 = 8734) | 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 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (61138 ÷ 11 = 5558) | 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 61138 a prime number?
No. 61138 = 2 × 7 × 11 × 397, so it is divisible by 2.
What are the factors of 61138?
1, 2, 7, 11, 14, 22, 77, 154, 397, 794, 2779, 4367, 5558, 8734, 30569, 61138.
What is 61138 in binary?
1110111011010010 (hexadecimal EED2, octal 167322).
What is the square root of 61138?
About 247.2610.
Is 61138 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 61138?
It is a composite number with 16 divisors.