25525649 has 2 divisors, whose sum is σ = 25525650. Its totient is φ = 25525648.

The previous prime is 25525627. The next prime is 25525663. The reversal of 25525649 is 94652552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16483600 + 9042049 = 4060^2 + 3007^2 .

It is a cyclic number.

It is not a de Polignac number, because 25525649 - 2⁸ = 25525393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25525609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12762824 + 12762825.

It is an arithmetic number, because the mean of its divisors is an integer number (12762825).

Almost surely, 2^25525649 is an apocalyptic number.

It is an amenable number.

25525649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25525649 is an equidigital number, since it uses as much as digits as its factorization.

25525649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 38.

The square root of 25525649 is about 5052.2914603178. The cubic root of 25525649 is about 294.4369188167.

The spelling of 25525649 in words is "twenty-five million, five hundred twenty-five thousand, six hundred forty-nine".