12015321 has 8 divisors (see below), whose sum is σ = 16537344. Its totient is φ = 7751760.

The previous prime is 12015307. The next prime is 12015359. The reversal of 12015321 is 12351021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12015321 - 2⁶ = 12015257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12015321.

It is not an unprimeable number, because it can be changed into a prime (12015301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64506 + ... + 64691.

It is an arithmetic number, because the mean of its divisors is an integer number (2067168).

Almost surely, 2^12015321 is an apocalyptic number.

It is an amenable number.

12015321 is a deficient number, since it is larger than the sum of its proper divisors (4522023).

12015321 is a wasteful number, since it uses less digits than its factorization.

12015321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129231.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12015321 is about 3466.3123056066. The cubic root of 12015321 is about 229.0402413343.

Adding to 12015321 its reverse (12351021), we get a palindrome (24366342).

The spelling of 12015321 in words is "twelve million, fifteen thousand, three hundred twenty-one".