25395449 has 2 divisors, whose sum is σ = 25395450. Its totient is φ = 25395448.

The previous prime is 25395443. The next prime is 25395451. The reversal of 25395449 is 94459352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15155449 + 10240000 = 3893^2 + 3200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25395449 is a prime.

Together with 25395451, 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 (25395443) 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, 12697724 + 12697725.

It is an arithmetic number, because the mean of its divisors is an integer number (12697725).

Almost surely, 2^25395449 is an apocalyptic number.

It is an amenable number.

25395449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25395449 is an equidigital number, since it uses as much as digits as its factorization.

25395449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 41.

The square root of 25395449 is about 5039.3897448005. The cubic root of 25395449 is about 293.9354486753.

The spelling of 25395449 in words is "twenty-five million, three hundred ninety-five thousand, four hundred forty-nine".