12240321 has 16 divisors (see below), whose sum is σ = 16719168. Its totient is φ = 7963200.

The previous prime is 12240311. The next prime is 12240341. The reversal of 12240321 is 12304221.

12240321 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12240321 - 2⁹ = 12239809 is a prime.

It is a zygodrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 12240321.

It is not an unprimeable number, because it can be changed into a prime (12240311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38455 + ... + 38771.

It is an arithmetic number, because the mean of its divisors is an integer number (1044948).

Almost surely, 2^12240321 is an apocalyptic number.

It is an amenable number.

12240321 is a deficient number, since it is larger than the sum of its proper divisors (4478847).

12240321 is a wasteful number, since it uses less digits than its factorization.

12240321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12240321 is about 3498.6170124779. The cubic root of 12240321 is about 230.4610851186.

Adding to 12240321 its reverse (12304221), we get a palindrome (24544542).

It can be divided in two parts, 12240 and 321, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 12240321 in words is "twelve million, two hundred forty thousand, three hundred twenty-one".