The number 75142
75142 is a composite number with 4 divisors. Its prime factorisation is 2 × 37571. Divisors (4): 1, 2, 37571, 75142.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 75142: a semiprime: 2 × 37571, the product of two primes.
- 2
75142 is composite. Its prime factorisation is
- 3
The divisors add up to 112716; without 75142 itself that is 37574, so 75142 is deficient (37574 is less than 75142). Euler's totient φ(75142) = 37570 numbers up to 75142 share no factor with it.
- 4
The digits of 75142 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 68 steps to reach 1.
LaTeX source of the formulas on this page
\[ 75142 = 2 \times 37571 \]
75142 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 112716 |
| Euler totient φ(n) | 37570 |
| Square | 5646320164 |
| Cube | 424275789763288 |
| Square root | 274.120411 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 68 |
| Scientific notation | 7.5142 × |
75142 in other forms
| Form | Value |
|---|---|
| In words | seventy-five thousand one hundred and forty-two |
| Binary (base 2) | 10010010110000110 |
| Octal (base 8) | 222606 |
| Hexadecimal (base 16) | 12586 |
| Base 3 | 10211002001 |
| As time | 75142 seconds = 20 h 52 min 22 s |
Is 75142 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (75142 ÷ 2 = 37571) | 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 | No (remainder 2) | 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 4) | 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 6) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | 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 75142 a prime number?
No. 75142 = 2 × 37571, so it is divisible by 2.
What are the factors of 75142?
1, 2, 37571, 75142.
What is 75142 in binary?
10010010110000110 (hexadecimal 12586, octal 222606).
What is the square root of 75142?
About 274.1204.
Is 75142 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 75142?
75142 is a semiprime: 2 × 37571, the product of two primes.