25559487 has 6 divisors (see below), whose sum is σ = 36919272. Its totient is φ = 17039652.

The previous prime is 25559467. The next prime is 25559491. The reversal of 25559487 is 78495552.

25559487 is a `hidden beast` number, since 2 + 55 + 594 + 8 + 7 = 666.

It is not a de Polignac number, because 25559487 - 2¹⁵ = 25526719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25559437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1419963 + ... + 1419980.

It is an arithmetic number, because the mean of its divisors is an integer number (6153212).

Almost surely, 2^25559487 is an apocalyptic number.

25559487 is a deficient number, since it is larger than the sum of its proper divisors (11359785).

25559487 is a wasteful number, since it uses less digits than its factorization.

25559487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839949 (or 2839946 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 25559487 is about 5055.6391287354. The cubic root of 25559487 is about 294.5669678398.

The spelling of 25559487 in words is "twenty-five million, five hundred fifty-nine thousand, four hundred eighty-seven".