13221043 has 8 divisors (see below), whose sum is σ = 14639040. Its totient is φ = 11839080.

The previous prime is 13221037. The next prime is 13221059. The reversal of 13221043 is 34012231.

It is a happy number.

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

It is not a de Polignac number, because 13221043 - 2⁵ = 13221011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8233 + ... + 9706.

It is an arithmetic number, because the mean of its divisors is an integer number (1829880).

Almost surely, 2^13221043 is an apocalyptic number.

13221043 is a deficient number, since it is larger than the sum of its proper divisors (1417997).

13221043 is a wasteful number, since it uses less digits than its factorization.

13221043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18017.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13221043 is about 3636.0752192440. The cubic root of 13221043 is about 236.4586682282.

Adding to 13221043 its reverse (34012231), we get a palindrome (47233274).

The spelling of 13221043 in words is "thirteen million, two hundred twenty-one thousand, forty-three".