25865887 has 2 divisors, whose sum is σ = 25865888. Its totient is φ = 25865886.

The previous prime is 25865881. The next prime is 25865911. The reversal of 25865887 is 78856852.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25865887 - 2⁷ = 25865759 is a prime.

It is a super-2 number, since 2×25865887² = 1338088220593538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25865887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25865881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932943 + 12932944.

It is an arithmetic number, because the mean of its divisors is an integer number (12932944).

Almost surely, 2^25865887 is an apocalyptic number.

25865887 is a deficient number, since it is larger than the sum of its proper divisors (1).

25865887 is an equidigital number, since it uses as much as digits as its factorization.

25865887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1075200, while the sum is 49.

The square root of 25865887 is about 5085.8516494290. The cubic root of 25865887 is about 295.7393576970.

The spelling of 25865887 in words is "twenty-five million, eight hundred sixty-five thousand, eight hundred eighty-seven".