25579985 has 32 divisors (see below), whose sum is σ = 35043840. Its totient is φ = 17805312.

The previous prime is 25579927. The next prime is 25579993. The reversal of 25579985 is 58997552.

It is a cyclic number.

It is not a de Polignac number, because 25579985 - 2⁶ = 25579921 is a prime.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 75737 + ... + 76073.

It is an arithmetic number, because the mean of its divisors is an integer number (1095120).

Almost surely, 2^25579985 is an apocalyptic number.

It is an amenable number.

25579985 is a deficient number, since it is larger than the sum of its proper divisors (9463855).

25579985 is a wasteful number, since it uses less digits than its factorization.

25579985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its digits is 1134000, while the sum is 50.

The square root of 25579985 is about 5057.6659636635. The cubic root of 25579985 is about 294.6456916462.

The spelling of 25579985 in words is "twenty-five million, five hundred seventy-nine thousand, nine hundred eighty-five".