25442915 has 16 divisors (see below), whose sum is σ = 31593888. Its totient is φ = 19658496.

The previous prime is 25442891. The next prime is 25442927. The reversal of 25442915 is 51924452.

It is a cyclic number.

It is not a de Polignac number, because 25442915 - 2²⁰ = 24394339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17039 + ... + 18471.

It is an arithmetic number, because the mean of its divisors is an integer number (1974618).

Almost surely, 2^25442915 is an apocalyptic number.

25442915 is a deficient number, since it is larger than the sum of its proper divisors (6150973).

25442915 is a wasteful number, since it uses less digits than its factorization.

25442915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558.

The product of its digits is 14400, while the sum is 32.

The square root of 25442915 is about 5044.0970450617. The cubic root of 25442915 is about 294.1184638369.

The spelling of 25442915 in words is "twenty-five million, four hundred forty-two thousand, nine hundred fifteen".