25538945 has 12 divisors (see below), whose sum is σ = 32346900. Its totient is φ = 19354464.

The previous prime is 25538927. The next prime is 25538959. The reversal of 25538945 is 54983552.

It can be written as a sum of positive squares in 2 ways, for example, as 17631601 + 7907344 = 4199^2 + 2812^2 .

It is not a de Polignac number, because 25538945 - 2⁶ = 25538881 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5270 + ... + 8879.

It is an arithmetic number, because the mean of its divisors is an integer number (2695575).

Almost surely, 2^25538945 is an apocalyptic number.

It is an amenable number.

25538945 is a deficient number, since it is larger than the sum of its proper divisors (6807955).

25538945 is a wasteful number, since it uses less digits than its factorization.

25538945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14192 (or 14173 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The square root of 25538945 is about 5053.6071275872. The cubic root of 25538945 is about 294.4880328124.

The spelling of 25538945 in words is "twenty-five million, five hundred thirty-eight thousand, nine hundred forty-five".