12312563 has 4 divisors (see below), whose sum is σ = 12364320. Its totient is φ = 12260808.

The previous prime is 12312557. The next prime is 12312571. The reversal of 12312563 is 36521321.

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 12312563 - 2¹⁰ = 12311539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25520 + ... + 25997.

It is an arithmetic number, because the mean of its divisors is an integer number (3091080).

Almost surely, 2^12312563 is an apocalyptic number.

12312563 is a deficient number, since it is larger than the sum of its proper divisors (51757).

12312563 is an equidigital number, since it uses as much as digits as its factorization.

12312563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51756.

The product of its digits is 1080, while the sum is 23.

The square root of 12312563 is about 3508.9261890214. The cubic root of 12312563 is about 230.9135874886.

Adding to 12312563 its reverse (36521321), we get a palindrome (48833884).

The spelling of 12312563 in words is "twelve million, three hundred twelve thousand, five hundred sixty-three".