Base | Representation |
---|---|
bin | 110001001101… |
… | …1011101000001 |
3 | 1210112220110102 |
4 | 1202123131001 |
5 | 23101140221 |
6 | 2321012145 |
7 | 432214061 |
oct | 142333501 |
9 | 53486412 |
10 | 25802561 |
11 | 13623934 |
12 | 8784055 |
13 | 54655b5 |
14 | 35d93a1 |
15 | 23ea30b |
hex | 189b741 |
25802561 has 2 divisors, whose sum is σ = 25802562. Its totient is φ = 25802560.
The previous prime is 25802531. The next prime is 25802563. The reversal of 25802561 is 16520852.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 13830961 + 11971600 = 3719^2 + 3460^2 .
It is a cyclic number.
It is not a de Polignac number, because 25802561 - 214 = 25786177 is a prime.
Together with 25802563, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (25802563) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12901280 + 12901281.
It is an arithmetic number, because the mean of its divisors is an integer number (12901281).
Almost surely, 225802561 is an apocalyptic number.
It is an amenable number.
25802561 is a deficient number, since it is larger than the sum of its proper divisors (1).
25802561 is an equidigital number, since it uses as much as digits as its factorization.
25802561 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 4800, while the sum is 29.
The square root of 25802561 is about 5079.6221316157. The cubic root of 25802561 is about 295.4978131104.
The spelling of 25802561 in words is "twenty-five million, eight hundred two thousand, five hundred sixty-one".
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