13012563 has 4 divisors (see below), whose sum is σ = 17350088. Its totient is φ = 8675040.

The previous prime is 13012553. The next prime is 13012579. The reversal of 13012563 is 36521031.

13012563 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13012563 - 2⁶ = 13012499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13012523) 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, 2168758 + ... + 2168763.

It is an arithmetic number, because the mean of its divisors is an integer number (4337522).

Almost surely, 2^13012563 is an apocalyptic number.

13012563 is a deficient number, since it is larger than the sum of its proper divisors (4337525).

13012563 is an equidigital number, since it uses as much as digits as its factorization.

13012563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337524.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 13012563 is about 3607.2930294058. The cubic root of 13012563 is about 235.2091875084.

Adding to 13012563 its reverse (36521031), we get a palindrome (49533594).

The spelling of 13012563 in words is "thirteen million, twelve thousand, five hundred sixty-three".