25478659 has 4 divisors (see below), whose sum is σ = 25520440. Its totient is φ = 25436880.

The previous prime is 25478657. The next prime is 25478701. The reversal of 25478659 is 95687452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25478659 - 2¹ = 25478657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25478657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19962 + ... + 21199.

It is an arithmetic number, because the mean of its divisors is an integer number (6380110).

Almost surely, 2^25478659 is an apocalyptic number.

25478659 is a deficient number, since it is larger than the sum of its proper divisors (41781).

25478659 is an equidigital number, since it uses as much as digits as its factorization.

25478659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41780.

The product of its digits is 604800, while the sum is 46.

The square root of 25478659 is about 5047.6389530156. The cubic root of 25478659 is about 294.2561321700.

The spelling of 25478659 in words is "twenty-five million, four hundred seventy-eight thousand, six hundred fifty-nine".