25724579 has 4 divisors (see below), whose sum is σ = 25756080. Its totient is φ = 25693080.

The previous prime is 25724549. The next prime is 25724593. The reversal of 25724579 is 97542752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25724579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25724539) 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, 14492 + ... + 16169.

It is an arithmetic number, because the mean of its divisors is an integer number (6439020).

Almost surely, 2^25724579 is an apocalyptic number.

25724579 is a deficient number, since it is larger than the sum of its proper divisors (31501).

25724579 is an equidigital number, since it uses as much as digits as its factorization.

25724579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31500.

The product of its digits is 176400, while the sum is 41.

The square root of 25724579 is about 5071.9403584821. The cubic root of 25724579 is about 295.1998224833.

The spelling of 25724579 in words is "twenty-five million, seven hundred twenty-four thousand, five hundred seventy-nine".