12413221 has 4 divisors (see below), whose sum is σ = 12425452. Its totient is φ = 12400992.

The previous prime is 12413209. The next prime is 12413227. The reversal of 12413221 is 12231421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 240100 + 12173121 = 490^2 + 3489^2 .

It is a cyclic number.

It is not a de Polignac number, because 12413221 - 2¹⁵ = 12380453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12413195 and 12413204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12413227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4440 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (3106363).

Almost surely, 2^12413221 is an apocalyptic number.

It is an amenable number.

12413221 is a deficient number, since it is larger than the sum of its proper divisors (12231).

12413221 is a wasteful number, since it uses less digits than its factorization.

12413221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230.

The product of its digits is 96, while the sum is 16.

The square root of 12413221 is about 3523.2401280639. The cubic root of 12413221 is about 231.5411374756.

Adding to 12413221 its reverse (12231421), we get a palindrome (24644642).

The spelling of 12413221 in words is "twelve million, four hundred thirteen thousand, two hundred twenty-one".