Base | Representation |
---|---|
bin | 11110010101100… |
… | …11100011110111 |
3 | 122201212110211211 |
4 | 33022303203313 |
5 | 1010122201441 |
6 | 41130342251 |
7 | 6210064615 |
oct | 1712634367 |
9 | 581773754 |
10 | 254490871 |
11 | 120720838 |
12 | 7128a987 |
13 | 4095581b |
14 | 25b286b5 |
15 | 1751ea81 |
hex | f2b38f7 |
254490871 has 2 divisors, whose sum is σ = 254490872. Its totient is φ = 254490870.
The previous prime is 254490869. The next prime is 254490893. The reversal of 254490871 is 178094452.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 254490871 - 21 = 254490869 is a prime.
Together with 254490869, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (254490671) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127245435 + 127245436.
It is an arithmetic number, because the mean of its divisors is an integer number (127245436).
Almost surely, 2254490871 is an apocalyptic number.
254490871 is a deficient number, since it is larger than the sum of its proper divisors (1).
254490871 is an equidigital number, since it uses as much as digits as its factorization.
254490871 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 80640, while the sum is 40.
The square root of 254490871 is about 15952.7700102521. The cubic root of 254490871 is about 633.7102563040.
The spelling of 254490871 in words is "two hundred fifty-four million, four hundred ninety thousand, eight hundred seventy-one".
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