25559859 has 16 divisors (see below), whose sum is σ = 37695392. Its totient is φ = 15303168.

The previous prime is 25559843. The next prime is 25559861. The reversal of 25559859 is 95895552.

It is not a de Polignac number, because 25559859 - 2⁴ = 25559843 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (25559879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7414 + ... + 10299.

It is an arithmetic number, because the mean of its divisors is an integer number (2355962).

Almost surely, 2^25559859 is an apocalyptic number.

25559859 is a deficient number, since it is larger than the sum of its proper divisors (12135533).

25559859 is a wasteful number, since it uses less digits than its factorization.

25559859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17766.

The product of its digits is 810000, while the sum is 48.

The square root of 25559859 is about 5055.6759192021. The cubic root of 25559859 is about 294.5683969032.

The spelling of 25559859 in words is "twenty-five million, five hundred fifty-nine thousand, eight hundred fifty-nine".