12320513 has 4 divisors (see below), whose sum is σ = 12334548. Its totient is φ = 12306480.

The previous prime is 12320507. The next prime is 12320549. The reversal of 12320513 is 31502321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31502321 = 269 ⋅117109.

It can be written as a sum of positive squares in 2 ways, for example, as 9591409 + 2729104 = 3097^2 + 1652^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320513 - 2⁶ = 12320449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12320491 and 12320500.

It is not an unprimeable number, because it can be changed into a prime (12320713) 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, 5606 + ... + 7487.

It is an arithmetic number, because the mean of its divisors is an integer number (3083637).

Almost surely, 2^12320513 is an apocalyptic number.

It is an amenable number.

12320513 is a deficient number, since it is larger than the sum of its proper divisors (14035).

12320513 is an equidigital number, since it uses as much as digits as its factorization.

12320513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14034.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12320513 is about 3510.0588314158. The cubic root of 12320513 is about 230.9632757096.

Adding to 12320513 its reverse (31502321), we get a palindrome (43822834).

The spelling of 12320513 in words is "twelve million, three hundred twenty thousand, five hundred thirteen".