13563025 has 48 divisors (see below), whose sum is σ = 20998656. Its totient is φ = 8478720.

The previous prime is 13563019. The next prime is 13563029. The reversal of 13563025 is 52036531.

It is a happy number.

It is not a de Polignac number, because 13563025 - 2⁷ = 13562897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13563029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139777 + ... + 139873.

It is an arithmetic number, because the mean of its divisors is an integer number (437472).

Almost surely, 2^13563025 is an apocalyptic number.

It is an amenable number.

13563025 is a deficient number, since it is larger than the sum of its proper divisors (7435631).

13563025 is a wasteful number, since it uses less digits than its factorization.

13563025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 13563025 is about 3682.8012436188. The cubic root of 13563025 is about 238.4801232214.

Adding to 13563025 its reverse (52036531), we get a palindrome (65599556).

The spelling of 13563025 in words is "thirteen million, five hundred sixty-three thousand, twenty-five".