13342321 has 4 divisors (see below), whose sum is σ = 13352512. Its totient is φ = 13332132.

The previous prime is 13342309. The next prime is 13342337. The reversal of 13342321 is 12324331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12324331 = 19 ⋅648649.

It is a cyclic number.

It is not a de Polignac number, because 13342321 - 2¹³ = 13334129 is a prime.

It is a super-3 number, since 3×13342321³ (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 (13342361) 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 3 ways as a sum of consecutive naturals, for example, 2781 + ... + 5866.

It is an arithmetic number, because the mean of its divisors is an integer number (3338128).

Almost surely, 2^13342321 is an apocalyptic number.

It is an amenable number.

13342321 is a deficient number, since it is larger than the sum of its proper divisors (10191).

13342321 is an equidigital number, since it uses as much as digits as its factorization.

13342321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10190.

The product of its digits is 432, while the sum is 19.

The square root of 13342321 is about 3652.7141963203. The cubic root of 13342321 is about 237.1794886178.

Adding to 13342321 its reverse (12324331), we get a palindrome (25666652).

It can be divided in two parts, 1334 and 2321, that added together give a triangular number (3655 = T₈₅).

The spelling of 13342321 in words is "thirteen million, three hundred forty-two thousand, three hundred twenty-one".