The number 61165
61165 is a composite number with 8 divisors. Its prime factorisation is 5 × 13 × 941. Divisors (8): 1, 5, 13, 65, 941, 4705, 12233, 61165.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61165 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61165 is composite. Its prime factorisation is
- 3
The divisors add up to 79128; without 61165 itself that is 17963, so 61165 is deficient (17963 is less than 61165). Euler's totient φ(61165) = 45120 numbers up to 61165 share no factor with it.
- 4
The digits of 61165 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
\[ 61165 = 5 \times 13 \times 941 \]
61165 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 79128 |
| Euler totient φ(n) | 45120 |
| Square | 3741157225 |
| Cube | 228827881667125 |
| Square root | 247.315588 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 73 |
| Scientific notation | 6.1165 × |
61165 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand one hundred and sixty-five |
| Binary (base 2) | 1110111011101101 |
| Octal (base 8) | 167355 |
| Hexadecimal (base 16) | EEED |
| Base 3 | 10002220101 |
| As time | 61165 seconds = 16 h 59 min 25 s |
Is 61165 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 (61165 ÷ 5 = 12233) | 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 6) | 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 5) | 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 5) | 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 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61165 a prime number?
No. 61165 = 5 × 13 × 941, so it is divisible by 5.
What are the factors of 61165?
1, 5, 13, 65, 941, 4705, 12233, 61165.
What is 61165 in binary?
1110111011101101 (hexadecimal EEED, octal 167355).
What is the square root of 61165?
About 247.3156.
Is 61165 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 61165?
It is a composite number with 8 divisors.