The number 61103
61103 is a composite number with 12 divisors. Its prime factorisation is × 29 × 43. Divisors (12): 1, 7, 29, 43, 49, 203, 301, 1247, 1421, 2107, 8729, 61103.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61103 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61103 is composite. Its prime factorisation is
- 3
The divisors add up to 75240; without 61103 itself that is 14137, so 61103 is deficient (14137 is less than 61103). Euler's totient φ(61103) = 49392 numbers up to 61103 share no factor with it.
- 4
The digits of 61103 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 135 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61103 = 7^{2} \times 29 \times 43 \]61103 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 75240 |
| Euler totient φ(n) | 49392 |
| Square | 3733576609 |
| Cube | 228132731539727 |
| Square root | 247.190210 (= 7√1247) |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 135 |
| Scientific notation | 6.1103 × |
61103 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand one hundred and three |
| Binary (base 2) | 1110111010101111 |
| Octal (base 8) | 167257 |
| Hexadecimal (base 16) | EEAF |
| Base 3 | 10002211002 |
| As time | 61103 seconds = 16 h 58 min 23 s |
Is 61103 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 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (61103 ÷ 7 = 8729) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61103 a prime number?
No. 61103 = × 29 × 43, so it is divisible by 7.
What are the factors of 61103?
1, 7, 29, 43, 49, 203, 301, 1247, 1421, 2107, 8729, 61103.
What is 61103 in binary?
1110111010101111 (hexadecimal EEAF, octal 167257).
What is the square root of 61103?
About 247.1902, exactly 7√1247.
Is 61103 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 61103?
It is a composite number with 12 divisors.