The number 42103
42103 is a composite number with 4 divisors. Its prime factorisation is 71 × 593. Divisors (4): 1, 71, 593, 42103.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42103: a semiprime: 71 × 593, the product of two primes.
- 2
42103 is composite. Its prime factorisation is
- 3
The divisors add up to 42768; without 42103 itself that is 665, so 42103 is deficient (665 is less than 42103). Euler's totient φ(42103) = 41440 numbers up to 42103 share no factor with it.
- 4
The digits of 42103 add up to 10, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 194 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42103 = 71 \times 593 \]
42103 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 42768 |
| Euler totient φ(n) | 41440 |
| Square | 1772662609 |
| Cube | 74634413826727 |
| Square root | 205.190156 |
| Digit sum / digital root | 10 / 1 |
| Collatz steps to 1 | 194 |
| Scientific notation | 4.2103 × |
42103 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand one hundred and three |
| Binary (base 2) | 1010010001110111 |
| Octal (base 8) | 122167 |
| Hexadecimal (base 16) | A477 |
| Base 3 | 2010202101 |
| As time | 42103 seconds = 11 h 41 min 43 s |
Is 42103 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 1) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42103 a prime number?
No. 42103 = 71 × 593, so it is divisible by 71.
What are the factors of 42103?
1, 71, 593, 42103.
What is 42103 in binary?
1010010001110111 (hexadecimal A477, octal 122167).
What is the square root of 42103?
About 205.1902.
Is 42103 divisible by 3?
No. Its digits add up to 10, which is not a multiple of 3.
What is special about the number 42103?
42103 is a semiprime: 71 × 593, the product of two primes.