25645945 has 16 divisors (see below), whose sum is σ = 35093520. Its totient is φ = 17823744.

The previous prime is 25645937. The next prime is 25645957. The reversal of 25645945 is 54954652.

It can be written as a sum of positive squares in 8 ways, for example, as 1849 + 25644096 = 43^2 + 5064^2 .

It is a cyclic number.

It is not a de Polignac number, because 25645945 - 2³ = 25645937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25645898 and 25645907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10500 + ... + 12709.

It is an arithmetic number, because the mean of its divisors is an integer number (2193345).

Almost surely, 2^25645945 is an apocalyptic number.

It is an amenable number.

25645945 is a deficient number, since it is larger than the sum of its proper divisors (9447575).

25645945 is a wasteful number, since it uses less digits than its factorization.

25645945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23244.

The product of its digits is 216000, while the sum is 40.

The square root of 25645945 is about 5064.1825599005. The cubic root of 25645945 is about 294.8987299619.

The spelling of 25645945 in words is "twenty-five million, six hundred forty-five thousand, nine hundred forty-five".