The number 42199
42199 is a composite number with 4 divisors. Its prime factorisation is 19 × 2221. Divisors (4): 1, 19, 2221, 42199.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42199: a semiprime: 19 × 2221, the product of two primes.
- 2
42199 is composite. Its prime factorisation is
- 3
The divisors add up to 44440; without 42199 itself that is 2241, so 42199 is deficient (2241 is less than 42199). Euler's totient φ(42199) = 39960 numbers up to 42199 share no factor with it.
- 4
The digits of 42199 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 80 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42199 = 19 \times 2221 \]
42199 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 44440 |
| Euler totient φ(n) | 39960 |
| Square | 1780755601 |
| Cube | 75146105606599 |
| Square root | 205.423952 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 80 |
| Scientific notation | 4.2199 × |
42199 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand one hundred and ninety-nine |
| Binary (base 2) | 1010010011010111 |
| Octal (base 8) | 122327 |
| Hexadecimal (base 16) | A4D7 |
| Base 3 | 2010212221 |
| As time | 42199 seconds = 11 h 43 min 19 s |
Is 42199 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 4) | 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 3) | 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | 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 42199 a prime number?
No. 42199 = 19 × 2221, so it is divisible by 19.
What are the factors of 42199?
1, 19, 2221, 42199.
What is 42199 in binary?
1010010011010111 (hexadecimal A4D7, octal 122327).
What is the square root of 42199?
About 205.4240.
Is 42199 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 42199?
42199 is a semiprime: 19 × 2221, the product of two primes.