12403221 has 8 divisors (see below), whose sum is σ = 16922400. Its totient is φ = 8076432.

The previous prime is 12403199. The next prime is 12403243. The reversal of 12403221 is 12230421.

It is an interprime number because it is at equal distance from previous prime (12403199) and next prime (12403243).

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

It is not a de Polignac number, because 12403221 - 2⁵ = 12403189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12403221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47946 + ... + 48203.

It is an arithmetic number, because the mean of its divisors is an integer number (2115300).

Almost surely, 2^12403221 is an apocalyptic number.

It is an amenable number.

12403221 is a deficient number, since it is larger than the sum of its proper divisors (4519179).

12403221 is an equidigital number, since it uses as much as digits as its factorization.

12403221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96195.

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

The square root of 12403221 is about 3521.8206939025. The cubic root of 12403221 is about 231.4789448233.

Adding to 12403221 its reverse (12230421), we get a palindrome (24633642).

The spelling of 12403221 in words is "twelve million, four hundred three thousand, two hundred twenty-one".