13221265 has 8 divisors (see below), whose sum is σ = 16089408. Its totient is φ = 10427760.

The previous prime is 13221233. The next prime is 13221269. The reversal of 13221265 is 56212231.

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

It is not a de Polignac number, because 13221265 - 2⁵ = 13221233 is a prime.

It is a super-3 number, since 3×13221265³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221269) 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 7 ways as a sum of consecutive naturals, for example, 18267 + ... + 18976.

It is an arithmetic number, because the mean of its divisors is an integer number (2011176).

Almost surely, 2^13221265 is an apocalyptic number.

It is an amenable number.

13221265 is a deficient number, since it is larger than the sum of its proper divisors (2868143).

13221265 is an equidigital number, since it uses as much as digits as its factorization.

13221265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37319.

The product of its digits is 720, while the sum is 22.

The square root of 13221265 is about 3636.1057465371. The cubic root of 13221265 is about 236.4599917126.

Adding to 13221265 its reverse (56212231), we get a palindrome (69433496).

The spelling of 13221265 in words is "thirteen million, two hundred twenty-one thousand, two hundred sixty-five".