The number 42949
42949 is a composite number with 4 divisors. Its prime factorisation is 29 × 1481. Divisors (4): 1, 29, 1481, 42949.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42949: a semiprime: 29 × 1481, the product of two primes.
- 2
42949 is composite. Its prime factorisation is
- 3
The divisors add up to 44460; without 42949 itself that is 1511, so 42949 is deficient (1511 is less than 42949). Euler's totient φ(42949) = 41440 numbers up to 42949 share no factor with it.
- 4
The digits of 42949 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42949 = 29 \times 1481 \]
42949 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 44460 |
| Euler totient φ(n) | 41440 |
| Square | 1844616601 |
| Cube | 79224438396349 |
| Square root | 207.241405 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 75 |
| Scientific notation | 4.2949 × |
42949 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand nine hundred and forty-nine |
| Binary (base 2) | 1010011111000101 |
| Octal (base 8) | 123705 |
| Hexadecimal (base 16) | A7C5 |
| Base 3 | 2011220201 |
| As time | 42949 seconds = 11 h 55 min 49 s |
Is 42949 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 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | 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 5) | 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 9) | 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 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42949 a prime number?
No. 42949 = 29 × 1481, so it is divisible by 29.
What are the factors of 42949?
1, 29, 1481, 42949.
What is 42949 in binary?
1010011111000101 (hexadecimal A7C5, octal 123705).
What is the square root of 42949?
About 207.2414.
Is 42949 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 42949?
42949 is a semiprime: 29 × 1481, the product of two primes.