25303649 has 12 divisors (see below), whose sum is σ = 30985200. Its totient is φ = 20546568.

The previous prime is 25303643. The next prime is 25303669. The reversal of 25303649 is 94630352.

It is not a de Polignac number, because 25303649 - 2¹⁶ = 25238113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25303643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12659 + ... + 14520.

It is an arithmetic number, because the mean of its divisors is an integer number (2582100).

Almost surely, 2^25303649 is an apocalyptic number.

It is an amenable number.

25303649 is a deficient number, since it is larger than the sum of its proper divisors (5681551).

25303649 is a wasteful number, since it uses less digits than its factorization.

25303649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27212 (or 27205 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 25303649 is about 5030.2732530152. The cubic root of 25303649 is about 293.5808463884.

It can be divided in two parts, 25303 and 649, that added together give a palindrome (25952).

The spelling of 25303649 in words is "twenty-five million, three hundred three thousand, six hundred forty-nine".