25442685 has 12 divisors (see below), whose sum is σ = 44100732. Its totient is φ = 13569408.

The previous prime is 25442639. The next prime is 25442687. The reversal of 25442685 is 58624452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14333796 + 11108889 = 3786^2 + 3333^2 .

It is not a de Polignac number, because 25442685 - 2⁶ = 25442621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282652 + ... + 282741.

It is an arithmetic number, because the mean of its divisors is an integer number (3675061).

Almost surely, 2^25442685 is an apocalyptic number.

It is an amenable number.

25442685 is a deficient number, since it is larger than the sum of its proper divisors (18658047).

25442685 is a wasteful number, since it uses less digits than its factorization.

25442685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565404 (or 565401 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 25442685 is about 5044.0742460832. The cubic root of 25442685 is about 294.1175775725.

The spelling of 25442685 in words is "twenty-five million, four hundred forty-two thousand, six hundred eighty-five".