The number 70042
70042 is a composite number with 8 divisors. Its prime factorisation is 2 × 7 × 5003. Divisors (8): 1, 2, 7, 14, 5003, 10006, 35021, 70042.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
70042 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
70042 is composite. Its prime factorisation is
- 3
The divisors add up to 120096; without 70042 itself that is 50054, so 70042 is deficient (50054 is less than 70042). Euler's totient φ(70042) = 30012 numbers up to 70042 share no factor with it.
- 4
The digits of 70042 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 81 steps to reach 1.
LaTeX source of the formulas on this page
\[ 70042 = 2 \times 7 \times 5003 \]
70042 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 120096 |
| Euler totient φ(n) | 30012 |
| Square | 4905881764 |
| Cube | 343617770514088 |
| Square root | 264.654492 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 81 |
| Scientific notation | 7.0042 × |
70042 in other forms
| Form | Value |
|---|---|
| In words | seventy thousand and forty-two |
| Binary (base 2) | 10001000110011010 |
| Octal (base 8) | 210632 |
| Hexadecimal (base 16) | 1119A |
| Base 3 | 10120002011 |
| As time | 70042 seconds = 19 h 27 min 22 s |
Is 70042 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (70042 ÷ 2 = 35021) | 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 | Yes (70042 ÷ 7 = 10006) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | 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 5) | 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 70042 a prime number?
No. 70042 = 2 × 7 × 5003, so it is divisible by 2.
What are the factors of 70042?
1, 2, 7, 14, 5003, 10006, 35021, 70042.
What is 70042 in binary?
10001000110011010 (hexadecimal 1119A, octal 210632).
What is the square root of 70042?
About 264.6545.
Is 70042 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 70042?
It is a composite number with 8 divisors.