12615563 has 4 divisors (see below), whose sum is σ = 13279560. Its totient is φ = 11951568.

The previous prime is 12615541. The next prime is 12615571. The reversal of 12615563 is 36551621.

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 12615563 - 2¹⁴ = 12599179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12615503) 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 3 ways as a sum of consecutive naturals, for example, 331970 + ... + 332007.

It is an arithmetic number, because the mean of its divisors is an integer number (3319890).

Almost surely, 2^12615563 is an apocalyptic number.

12615563 is a deficient number, since it is larger than the sum of its proper divisors (663997).

12615563 is an equidigital number, since it uses as much as digits as its factorization.

12615563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663996.

The product of its digits is 5400, while the sum is 29.

The square root of 12615563 is about 3551.8393826298. The cubic root of 12615563 is about 232.7924435044.

The spelling of 12615563 in words is "twelve million, six hundred fifteen thousand, five hundred sixty-three".