25855187 has 2 divisors, whose sum is σ = 25855188. Its totient is φ = 25855186.

The previous prime is 25855183. The next prime is 25855237. The reversal of 25855187 is 78155852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25855187 - 2² = 25855183 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25855183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12927593 + 12927594.

It is an arithmetic number, because the mean of its divisors is an integer number (12927594).

Almost surely, 2^25855187 is an apocalyptic number.

25855187 is a deficient number, since it is larger than the sum of its proper divisors (1).

25855187 is an equidigital number, since it uses as much as digits as its factorization.

25855187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112000, while the sum is 41.

The square root of 25855187 is about 5084.7996027376. The cubic root of 25855187 is about 295.6985723495.

The spelling of 25855187 in words is "twenty-five million, eight hundred fifty-five thousand, one hundred eighty-seven".