25645012 has 12 divisors (see below), whose sum is σ = 44980180. Its totient is φ = 12793536.

The previous prime is 25645007. The next prime is 25645013. The reversal of 25645012 is 21054652.

It can be written as a sum of positive squares in 2 ways, for example, as 10010896 + 15634116 = 3164^2 + 3954^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5187 + ... + 8842.

Almost surely, 2^25645012 is an apocalyptic number.

It is an amenable number.

25645012 is a deficient number, since it is larger than the sum of its proper divisors (19335168).

25645012 is a wasteful number, since it uses less digits than its factorization.

25645012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490 (or 14488 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25645012 is about 5064.0904415304. The cubic root of 25645012 is about 294.8951537780.

Adding to 25645012 its reverse (21054652), we get a palindrome (46699664).

The spelling of 25645012 in words is "twenty-five million, six hundred forty-five thousand, twelve".