25904257 has 2 divisors, whose sum is σ = 25904258. Its totient is φ = 25904256.

The previous prime is 25904237. The next prime is 25904261. The reversal of 25904257 is 75240952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22810176 + 3094081 = 4776^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 25904257 - 2⁷ = 25904129 is a prime.

It is not a weakly prime, because it can be changed into another prime (25904237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12952128 + 12952129.

It is an arithmetic number, because the mean of its divisors is an integer number (12952129).

Almost surely, 2^25904257 is an apocalyptic number.

It is an amenable number.

25904257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25904257 is an equidigital number, since it uses as much as digits as its factorization.

25904257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 25904257 is about 5089.6224810884. The cubic root of 25904257 is about 295.8855207718.

The spelling of 25904257 in words is "twenty-five million, nine hundred four thousand, two hundred fifty-seven".