The number 74942
74942 is a composite number with 16 divisors. Its prime factorisation is 2 × 7 × 53 × 101. Divisors (16): 1, 2, 7, 14, 53, 101, 106, 202, 371, 707, 742, 1414, 5353, 10706, 37471, 74942.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
74942 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
74942 is composite. Its prime factorisation is
- 3
The divisors add up to 132192; without 74942 itself that is 57250, so 74942 is deficient (57250 is less than 74942). Euler's totient φ(74942) = 31200 numbers up to 74942 share no factor with it.
- 4
The digits of 74942 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 50 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74942 = 2 \times 7 \times 53 \times 101 \]
74942 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 132192 |
| Euler totient φ(n) | 31200 |
| Square | 5616303364 |
| Cube | 420897006704888 |
| Square root | 273.755365 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 50 |
| Scientific notation | 7.4942 × |
74942 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand nine hundred and forty-two |
| Binary (base 2) | 10010010010111110 |
| Octal (base 8) | 222276 |
| Hexadecimal (base 16) | 124BE |
| Base 3 | 10210210122 |
| As time | 74942 seconds = 20 h 49 min 2 s |
Is 74942 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (74942 ÷ 2 = 37471) | 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 | Yes (74942 ÷ 7 = 10706) | 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 8) | 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 10) | 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 74942 a prime number?
No. 74942 = 2 × 7 × 53 × 101, so it is divisible by 2.
What are the factors of 74942?
1, 2, 7, 14, 53, 101, 106, 202, 371, 707, 742, 1414, 5353, 10706, 37471, 74942.
What is 74942 in binary?
10010010010111110 (hexadecimal 124BE, octal 222276).
What is the square root of 74942?
About 273.7554.
Is 74942 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 74942?
It is a composite number with 16 divisors.