25425949 has 2 divisors, whose sum is σ = 25425950. Its totient is φ = 25425948.

The previous prime is 25425937. The next prime is 25425977. The reversal of 25425949 is 94952452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 4173849 = 4610^2 + 2043^2 .

It is a cyclic number.

It is not a de Polignac number, because 25425949 - 2⁷ = 25425821 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25425979) 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, 12712974 + 12712975.

It is an arithmetic number, because the mean of its divisors is an integer number (12712975).

Almost surely, 2^25425949 is an apocalyptic number.

It is an amenable number.

25425949 is a deficient number, since it is larger than the sum of its proper divisors (1).

25425949 is an equidigital number, since it uses as much as digits as its factorization.

25425949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 25425949 is about 5042.4149968046. The cubic root of 25425949 is about 294.0530740100.

The spelling of 25425949 in words is "twenty-five million, four hundred twenty-five thousand, nine hundred forty-nine".