25839257 has 2 divisors, whose sum is σ = 25839258. Its totient is φ = 25839256.

The previous prime is 25839251. The next prime is 25839277. The reversal of 25839257 is 75293852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13756681 + 12082576 = 3709^2 + 3476^2 .

It is a cyclic number.

It is not a de Polignac number, because 25839257 - 2⁶ = 25839193 is a prime.

It is not a weakly prime, because it can be changed into another prime (25839251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12919628 + 12919629.

It is an arithmetic number, because the mean of its divisors is an integer number (12919629).

Almost surely, 2^25839257 is an apocalyptic number.

It is an amenable number.

25839257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25839257 is an equidigital number, since it uses as much as digits as its factorization.

25839257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 25839257 is about 5083.2329279702. The cubic root of 25839257 is about 295.6378308820.

The spelling of 25839257 in words is "twenty-five million, eight hundred thirty-nine thousand, two hundred fifty-seven".