25442279 has 4 divisors (see below), whose sum is σ = 25922376. Its totient is φ = 24962184.

The previous prime is 25442269. The next prime is 25442281. The reversal of 25442279 is 97224452.

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 25442279 - 2⁸ = 25442023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442269) 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, 239969 + ... + 240074.

It is an arithmetic number, because the mean of its divisors is an integer number (6480594).

Almost surely, 2^25442279 is an apocalyptic number.

25442279 is a deficient number, since it is larger than the sum of its proper divisors (480097).

25442279 is an equidigital number, since it uses as much as digits as its factorization.

25442279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480096.

The product of its digits is 40320, while the sum is 35.

The square root of 25442279 is about 5044.0340006784. The cubic root of 25442279 is about 294.1160131101.

The spelling of 25442279 in words is "twenty-five million, four hundred forty-two thousand, two hundred seventy-nine".