The number 70142
70142 is a composite number with 8 divisors. Its prime factorisation is 2 × 17 × 2063. Divisors (8): 1, 2, 17, 34, 2063, 4126, 35071, 70142.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 70142: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
70142 is composite. Its prime factorisation is
- 3
The divisors add up to 111456; without 70142 itself that is 41314, so 70142 is deficient (41314 is less than 70142). Euler's totient φ(70142) = 32992 numbers up to 70142 share no factor with it.
- 4
The digits of 70142 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 68 steps to reach 1.
LaTeX source of the formulas on this page
\[ 70142 = 2 \times 17 \times 2063 \]
70142 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 111456 |
| Euler totient φ(n) | 32992 |
| Square | 4919900164 |
| Cube | 345091637303288 |
| Square root | 264.843350 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 68 |
| Scientific notation | 7.0142 × |
70142 in other forms
| Form | Value |
|---|---|
| In words | seventy thousand one hundred and forty-two |
| Binary (base 2) | 10001000111111110 |
| Octal (base 8) | 210776 |
| Hexadecimal (base 16) | 111FE |
| Base 3 | 10120012212 |
| As time | 70142 seconds = 19 h 29 min 2 s |
Is 70142 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (70142 ÷ 2 = 35071) | 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 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 5) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 70142 a prime number?
No. 70142 = 2 × 17 × 2063, so it is divisible by 2.
What are the factors of 70142?
1, 2, 17, 34, 2063, 4126, 35071, 70142.
What is 70142 in binary?
10001000111111110 (hexadecimal 111FE, octal 210776).
What is the square root of 70142?
About 264.8433.
Is 70142 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 70142?
70142 is a happy number: repeatedly adding the squares of its digits reaches 1.