25560945 has 24 divisors (see below), whose sum is σ = 46913256. Its totient is φ = 12830208.

The previous prime is 25560937. The next prime is 25560959. The reversal of 25560945 is 54906552.

25560945 is a `hidden beast` number, since 2 + 5 + 5 + 609 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12362256 + 13198689 = 3516^2 + 3633^2 .

It is not a de Polignac number, because 25560945 - 2³ = 25560937 is a prime.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 15942 + ... + 17471.

It is an arithmetic number, because the mean of its divisors is an integer number (1954719).

Almost surely, 2^25560945 is an apocalyptic number.

It is an amenable number.

25560945 is a deficient number, since it is larger than the sum of its proper divisors (21352311).

25560945 is a wasteful number, since it uses less digits than its factorization.

25560945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33441 (or 33438 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 25560945 is about 5055.7833220976. The cubic root of 25560945 is about 294.5725687670.

The spelling of 25560945 in words is "twenty-five million, five hundred sixty thousand, nine hundred forty-five".