The number 42371
42371 is a composite number with 4 divisors. Its prime factorisation is 7 × 6053. Divisors (4): 1, 7, 6053, 42371.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42371: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 7 × 6053, the product of two primes.
- 2
42371 is composite. Its prime factorisation is
- 3
The divisors add up to 48432; without 42371 itself that is 6061, so 42371 is deficient (6061 is less than 42371). Euler's totient φ(42371) = 36312 numbers up to 42371 share no factor with it.
- 4
The digits of 42371 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42371 = 7 \times 6053 \]
42371 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 48432 |
| Euler totient φ(n) | 36312 |
| Square | 1795301641 |
| Cube | 76068725830811 |
| Square root | 205.842173 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2371 × |
42371 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand three hundred and seventy-one |
| Binary (base 2) | 1010010110000011 |
| Octal (base 8) | 122603 |
| Hexadecimal (base 16) | A583 |
| Base 3 | 2011010022 |
| As time | 42371 seconds = 11 h 46 min 11 s |
Is 42371 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 1) | 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 (42371 ÷ 7 = 6053) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 42371 a prime number?
No. 42371 = 7 × 6053, so it is divisible by 7.
What are the factors of 42371?
1, 7, 6053, 42371.
What is 42371 in binary?
1010010110000011 (hexadecimal A583, octal 122603).
What is the square root of 42371?
About 205.8422.
Is 42371 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 42371?
42371 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 7 × 6053, the product of two primes.