25452979 has 4 divisors (see below), whose sum is σ = 25471584. Its totient is φ = 25434376.

The previous prime is 25452967. The next prime is 25453009. The reversal of 25452979 is 97925452.

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 25452979 - 2²³ = 17064371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25422979) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7072 + ... + 10045.

It is an arithmetic number, because the mean of its divisors is an integer number (6367896).

Almost surely, 2^25452979 is an apocalyptic number.

25452979 is a deficient number, since it is larger than the sum of its proper divisors (18605).

25452979 is a wasteful number, since it uses less digits than its factorization.

25452979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18604.

The product of its digits is 226800, while the sum is 43.

The square root of 25452979 is about 5045.0945481725. The cubic root of 25452979 is about 294.1572384562.

The spelling of 25452979 in words is "twenty-five million, four hundred fifty-two thousand, nine hundred seventy-nine".