25856671 has 2 divisors, whose sum is σ = 25856672. Its totient is φ = 25856670.

The previous prime is 25856651. The next prime is 25856681. The reversal of 25856671 is 17665852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25856671 - 2⁷ = 25856543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25856651) 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, 12928335 + 12928336.

It is an arithmetic number, because the mean of its divisors is an integer number (12928336).

Almost surely, 2^25856671 is an apocalyptic number.

25856671 is a deficient number, since it is larger than the sum of its proper divisors (1).

25856671 is an equidigital number, since it uses as much as digits as its factorization.

25856671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 25856671 is about 5084.9455257652. The cubic root of 25856671 is about 295.7042296062.

The spelling of 25856671 in words is "twenty-five million, eight hundred fifty-six thousand, six hundred seventy-one".