25648871 has 2 divisors, whose sum is σ = 25648872. Its totient is φ = 25648870.

The previous prime is 25648867. The next prime is 25648891. The reversal of 25648871 is 17884652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25648871 - 2² = 25648867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25648891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12824435 + 12824436.

It is an arithmetic number, because the mean of its divisors is an integer number (12824436).

Almost surely, 2^25648871 is an apocalyptic number.

25648871 is a deficient number, since it is larger than the sum of its proper divisors (1).

25648871 is an equidigital number, since it uses as much as digits as its factorization.

25648871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 25648871 is about 5064.4714432999. The cubic root of 25648871 is about 294.9099447416.

The spelling of 25648871 in words is "twenty-five million, six hundred forty-eight thousand, eight hundred seventy-one".