25542579 has 4 divisors (see below), whose sum is σ = 34056776. Its totient is φ = 17028384.

The previous prime is 25542577. The next prime is 25542599. The reversal of 25542579 is 97524552.

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

It is not a de Polignac number, because 25542579 - 2¹ = 25542577 is a prime.

It is a super-3 number, since 3×25542579³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25542571) 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, 4257094 + ... + 4257099.

It is an arithmetic number, because the mean of its divisors is an integer number (8514194).

Almost surely, 2^25542579 is an apocalyptic number.

25542579 is a deficient number, since it is larger than the sum of its proper divisors (8514197).

25542579 is an equidigital number, since it uses as much as digits as its factorization.

25542579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8514196.

The product of its digits is 126000, while the sum is 39.

The square root of 25542579 is about 5053.9666599613. The cubic root of 25542579 is about 294.5019999614.

The spelling of 25542579 in words is "twenty-five million, five hundred forty-two thousand, five hundred seventy-nine".