13321145 has 4 divisors (see below), whose sum is σ = 15985380. Its totient is φ = 10656912.

The previous prime is 13321129. The next prime is 13321151. The reversal of 13321145 is 54112331.

13321145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 1923769 + 11397376 = 1387^2 + 3376^2 .

It is a cyclic number.

It is not a de Polignac number, because 13321145 - 2⁴ = 13321129 is a prime.

It is a super-2 number, since 2×13321145² = 354905808222050, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1332110 + ... + 1332119.

It is an arithmetic number, because the mean of its divisors is an integer number (3996345).

Almost surely, 2^13321145 is an apocalyptic number.

It is an amenable number.

13321145 is a deficient number, since it is larger than the sum of its proper divisors (2664235).

13321145 is an equidigital number, since it uses as much as digits as its factorization.

13321145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664234.

The product of its digits is 360, while the sum is 20.

The square root of 13321145 is about 3649.8143788418. The cubic root of 13321145 is about 237.0539439363.

Adding to 13321145 its reverse (54112331), we get a palindrome (67433476).

The spelling of 13321145 in words is "thirteen million, three hundred twenty-one thousand, one hundred forty-five".