12320015 has 4 divisors (see below), whose sum is σ = 14784024. Its totient is φ = 9856008.

The previous prime is 12319997. The next prime is 12320017. The reversal of 12320015 is 51002321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51002321 = 79 ⋅645599.

It is a cyclic number.

It is not a de Polignac number, because 12320015 - 2¹⁰ = 12318991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231997 + ... + 1232006.

It is an arithmetic number, because the mean of its divisors is an integer number (3696006).

Almost surely, 2^12320015 is an apocalyptic number.

12320015 is a deficient number, since it is larger than the sum of its proper divisors (2464009).

12320015 is an equidigital number, since it uses as much as digits as its factorization.

12320015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464008.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12320015 is about 3509.9878917170. The cubic root of 12320015 is about 230.9601637921.

Adding to 12320015 its reverse (51002321), we get a palindrome (63322336).

The spelling of 12320015 in words is "twelve million, three hundred twenty thousand, fifteen".