25816871 has 2 divisors, whose sum is σ = 25816872. Its totient is φ = 25816870.

The previous prime is 25816859. The next prime is 25816891. The reversal of 25816871 is 17861852.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25816871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25816811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12908435 + 12908436.

It is an arithmetic number, because the mean of its divisors is an integer number (12908436).

Almost surely, 2^25816871 is an apocalyptic number.

25816871 is a deficient number, since it is larger than the sum of its proper divisors (1).

25816871 is an equidigital number, since it uses as much as digits as its factorization.

25816871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 25816871 is about 5081.0305057144. The cubic root of 25816871 is about 295.5524303275.

The spelling of 25816871 in words is "twenty-five million, eight hundred sixteen thousand, eight hundred seventy-one".