13344421 has 4 divisors (see below), whose sum is σ = 13563244. Its totient is φ = 13125600.

The previous prime is 13344407. The next prime is 13344427. The reversal of 13344421 is 12444331.

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 3802500 + 9541921 = 1950^2 + 3089^2 .

It is a cyclic number.

It is not a de Polignac number, because 13344421 - 2¹⁵ = 13311653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13344392 and 13344401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13344427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109320 + ... + 109441.

It is an arithmetic number, because the mean of its divisors is an integer number (3390811).

Almost surely, 2^13344421 is an apocalyptic number.

It is an amenable number.

13344421 is a deficient number, since it is larger than the sum of its proper divisors (218823).

13344421 is an equidigital number, since it uses as much as digits as its factorization.

13344421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218822.

The product of its digits is 1152, while the sum is 22.

The square root of 13344421 is about 3653.0016424853. The cubic root of 13344421 is about 237.1919315003.

Adding to 13344421 its reverse (12444331), we get a palindrome (25788752).

The spelling of 13344421 in words is "thirteen million, three hundred forty-four thousand, four hundred twenty-one".