12040321 has 4 divisors (see below), whose sum is σ = 12114352. Its totient is φ = 11966292.

The previous prime is 12040309. The next prime is 12040331. The reversal of 12040321 is 12304021.

12040321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12040321 - 2⁵ = 12040289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12040331) 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, 36771 + ... + 37096.

It is an arithmetic number, because the mean of its divisors is an integer number (3028588).

Almost surely, 2^12040321 is an apocalyptic number.

It is an amenable number.

12040321 is a deficient number, since it is larger than the sum of its proper divisors (74031).

12040321 is an equidigital number, since it uses as much as digits as its factorization.

12040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74030.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12040321 is about 3469.9165696022. The cubic root of 12040321 is about 229.1989841953.

Adding to 12040321 its reverse (12304021), we get a palindrome (24344342).

The spelling of 12040321 in words is "twelve million, forty thousand, three hundred twenty-one".