13221245 has 16 divisors (see below), whose sum is σ = 17280000. Its totient is φ = 9672768.

The previous prime is 13221233. The next prime is 13221269. The reversal of 13221245 is 54212231.

It is a cyclic number.

It is not a de Polignac number, because 13221245 - 2⁸ = 13220989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (1080000).

Almost surely, 2^13221245 is an apocalyptic number.

It is an amenable number.

13221245 is a deficient number, since it is larger than the sum of its proper divisors (4058755).

13221245 is a wasteful number, since it uses less digits than its factorization.

13221245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852.

The product of its digits is 480, while the sum is 20.

The square root of 13221245 is about 3636.1029963410. The cubic root of 13221245 is about 236.4598724803.

Adding to 13221245 its reverse (54212231), we get a palindrome (67433476).

The spelling of 13221245 in words is "thirteen million, two hundred twenty-one thousand, two hundred forty-five".