13330421 has 4 divisors (see below), whose sum is σ = 14355852. Its totient is φ = 12304992.

The previous prime is 13330379. The next prime is 13330423. The reversal of 13330421 is 12403331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12403331 = 401 ⋅30931.

It can be written as a sum of positive squares in 2 ways, for example, as 2208196 + 11122225 = 1486^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 13330421 - 2¹⁸ = 13068277 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 13330421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13330423) 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, 512696 + ... + 512721.

It is an arithmetic number, because the mean of its divisors is an integer number (3588963).

Almost surely, 2^13330421 is an apocalyptic number.

It is an amenable number.

13330421 is a deficient number, since it is larger than the sum of its proper divisors (1025431).

13330421 is a wasteful number, since it uses less digits than its factorization.

13330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025430.

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

The square root of 13330421 is about 3651.0849072570. The cubic root of 13330421 is about 237.1089542773.

Adding to 13330421 its reverse (12403331), we get a palindrome (25733752).

The spelling of 13330421 in words is "thirteen million, three hundred thirty thousand, four hundred twenty-one".