13303421 has 4 divisors (see below), whose sum is σ = 13333500. Its totient is φ = 13273344.

The previous prime is 13303403. The next prime is 13303471. The reversal of 13303421 is 12430331.

It is a happy number.

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 10310521 + 2992900 = 3211^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 13303421 - 2⁶ = 13303357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13303421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13303471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14366 + ... + 15263.

It is an arithmetic number, because the mean of its divisors is an integer number (3333375).

Almost surely, 2^13303421 is an apocalyptic number.

It is an amenable number.

13303421 is a deficient number, since it is larger than the sum of its proper divisors (30079).

13303421 is an equidigital number, since it uses as much as digits as its factorization.

13303421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30078.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 13303421 is about 3647.3855019726. The cubic root of 13303421 is about 236.9487625651.

Adding to 13303421 its reverse (12430331), we get a palindrome (25733752).

The spelling of 13303421 in words is "thirteen million, three hundred three thousand, four hundred twenty-one".