13290321 has 16 divisors (see below), whose sum is σ = 19623168. Its totient is φ = 7933200.

The previous prime is 13290317. The next prime is 13290349. The reversal of 13290321 is 12309231.

It is a happy number.

13290321 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13290321 - 2² = 13290317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13290391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 5216.

It is an arithmetic number, because the mean of its divisors is an integer number (1226448).

Almost surely, 2^13290321 is an apocalyptic number.

13290321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13290321 is a deficient number, since it is larger than the sum of its proper divisors (6332847).

13290321 is a wasteful number, since it uses less digits than its factorization.

13290321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6092.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 13290321 is about 3645.5892527821. The cubic root of 13290321 is about 236.8709618199.

Adding to 13290321 its reverse (12309231), we get a palindrome (25599552).

The spelling of 13290321 in words is "thirteen million, two hundred ninety thousand, three hundred twenty-one".