25425899 has 2 divisors, whose sum is σ = 25425900. Its totient is φ = 25425898.

The previous prime is 25425889. The next prime is 25425901. The reversal of 25425899 is 99852452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25425899 is a prime.

It is a Sophie Germain prime.

Together with 25425901, 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 (25425839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12712949 + 12712950.

It is an arithmetic number, because the mean of its divisors is an integer number (12712950).

Almost surely, 2^25425899 is an apocalyptic number.

25425899 is a deficient number, since it is larger than the sum of its proper divisors (1).

25425899 is an equidigital number, since it uses as much as digits as its factorization.

25425899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The square root of 25425899 is about 5042.4100388604. The cubic root of 25425899 is about 294.0528812586.

The spelling of 25425899 in words is "twenty-five million, four hundred twenty-five thousand, eight hundred ninety-nine".