13042563 has 4 divisors (see below), whose sum is σ = 17390088. Its totient is φ = 8695040.

The previous prime is 13042559. The next prime is 13042571. The reversal of 13042563 is 36524031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13042563 - 2² = 13042559 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (13042583) 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, 2173758 + ... + 2173763.

It is an arithmetic number, because the mean of its divisors is an integer number (4347522).

Almost surely, 2^13042563 is an apocalyptic number.

13042563 is a deficient number, since it is larger than the sum of its proper divisors (4347525).

13042563 is an equidigital number, since it uses as much as digits as its factorization.

13042563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347524.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 13042563 is about 3611.4488782205. The cubic root of 13042563 is about 235.3898042426.

Adding to 13042563 its reverse (36524031), we get a palindrome (49566594).

The spelling of 13042563 in words is "thirteen million, forty-two thousand, five hundred sixty-three".