25878871 has 2 divisors, whose sum is σ = 25878872. Its totient is φ = 25878870.

The previous prime is 25878857. The next prime is 25878907. The reversal of 25878871 is 17887852.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25878871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25878071) 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, 12939435 + 12939436.

It is an arithmetic number, because the mean of its divisors is an integer number (12939436).

Almost surely, 2^25878871 is an apocalyptic number.

25878871 is a deficient number, since it is larger than the sum of its proper divisors (1).

25878871 is an equidigital number, since it uses as much as digits as its factorization.

25878871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 46.

The square root of 25878871 is about 5087.1279716555. The cubic root of 25878871 is about 295.7888338983.

The spelling of 25878871 in words is "twenty-five million, eight hundred seventy-eight thousand, eight hundred seventy-one".