12220349 has 4 divisors (see below), whose sum is σ = 12233340. Its totient is φ = 12207360.

The previous prime is 12220333. The next prime is 12220361. The reversal of 12220349 is 94302221.

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 3705625 + 8514724 = 1925^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220349 - 2⁴ = 12220333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4964 + ... + 7005.

It is an arithmetic number, because the mean of its divisors is an integer number (3058335).

Almost surely, 2^12220349 is an apocalyptic number.

It is an amenable number.

12220349 is a deficient number, since it is larger than the sum of its proper divisors (12991).

12220349 is a wasteful number, since it uses less digits than its factorization.

12220349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12990.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12220349 is about 3495.7615765381. The cubic root of 12220349 is about 230.3356724370.

The spelling of 12220349 in words is "twelve million, two hundred twenty thousand, three hundred forty-nine".