13563045 has 42 divisors (see below), whose sum is σ = 24808914. Its totient is φ = 7115040.

The previous prime is 13563041. The next prime is 13563049. The reversal of 13563045 is 54036531.

13563045 is a `hidden beast` number, since 1 + 356 + 304 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (13563041) and next prime (13563049).

It can be written as a sum of positive squares in 3 ways, for example, as 1052676 + 12510369 = 1026^2 + 3537^2 .

It is not a de Polignac number, because 13563045 - 2² = 13563041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13563041) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 222315 + ... + 222375.

Almost surely, 2^13563045 is an apocalyptic number.

13563045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13563045 is a deficient number, since it is larger than the sum of its proper divisors (11245869).

13563045 is an frugal number, since it uses more digits than its factorization.

13563045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 13563045 is about 3682.8039589422. The cubic root of 13563045 is about 238.4802404420.

Adding to 13563045 its reverse (54036531), we get a palindrome (67599576).

The spelling of 13563045 in words is "thirteen million, five hundred sixty-three thousand, forty-five".