25855945 has 4 divisors (see below), whose sum is σ = 31027140. Its totient is φ = 20684752.

The previous prime is 25855939. The next prime is 25855957. The reversal of 25855945 is 54955852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16289296 + 9566649 = 4036^2 + 3093^2 .

It is a cyclic number.

It is not a de Polignac number, because 25855945 - 2³ = 25855937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2585590 + ... + 2585599.

It is an arithmetic number, because the mean of its divisors is an integer number (7756785).

Almost surely, 2^25855945 is an apocalyptic number.

It is an amenable number.

25855945 is a deficient number, since it is larger than the sum of its proper divisors (5171195).

25855945 is an equidigital number, since it uses as much as digits as its factorization.

25855945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171194.

The product of its digits is 360000, while the sum is 43.

The square root of 25855945 is about 5084.8741380687. The cubic root of 25855945 is about 295.7014619996.

The spelling of 25855945 in words is "twenty-five million, eight hundred fifty-five thousand, nine hundred forty-five".