The number 61090
61090 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 41 × 149. Divisors (16): 1, 2, 5, 10, 41, 82, 149, 205, 298, 410, 745, 1490, 6109, 12218, 30545, 61090.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61090 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61090 is composite. Its prime factorisation is
- 3
The divisors add up to 113400; without 61090 itself that is 52310, so 61090 is deficient (52310 is less than 61090). Euler's totient φ(61090) = 23680 numbers up to 61090 share no factor with it.
- 4
The digits of 61090 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 86 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61090 = 2 \times 5 \times 41 \times 149 \]
61090 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 113400 |
| Euler totient φ(n) | 23680 |
| Square | 3731988100 |
| Cube | 227987153029000 |
| Square root | 247.163913 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 86 |
| Scientific notation | 6.109 × |
61090 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand and ninety |
| Binary (base 2) | 1110111010100010 |
| Octal (base 8) | 167242 |
| Hexadecimal (base 16) | EEA2 |
| Base 3 | 10002210121 |
| As time | 61090 seconds = 16 h 58 min 10 s |
Is 61090 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (61090 ÷ 2 = 30545) | 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 | Yes (61090 ÷ 5 = 12218) | 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 1) | 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (61090 ÷ 10 = 6109) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61090 a prime number?
No. 61090 = 2 × 5 × 41 × 149, so it is divisible by 2.
What are the factors of 61090?
1, 2, 5, 10, 41, 82, 149, 205, 298, 410, 745, 1490, 6109, 12218, 30545, 61090.
What is 61090 in binary?
1110111010100010 (hexadecimal EEA2, octal 167242).
What is the square root of 61090?
About 247.1639.
Is 61090 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 61090?
It is a composite number with 16 divisors.