13332421 has 4 divisors (see below), whose sum is σ = 13657644. Its totient is φ = 13007200.

The previous prime is 13332409. The next prime is 13332427. The reversal of 13332421 is 12423331.

13332421 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, and also an emirpimes, since its reverse is a distinct semiprime: 12423331 = 263 ⋅47237.

It can be written as a sum of positive squares in 2 ways, for example, as 1677025 + 11655396 = 1295^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 13332421 - 2¹⁵ = 13299653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13332427) 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, 162550 + ... + 162631.

It is an arithmetic number, because the mean of its divisors is an integer number (3414411).

Almost surely, 2^13332421 is an apocalyptic number.

It is an amenable number.

13332421 is a deficient number, since it is larger than the sum of its proper divisors (325223).

13332421 is an equidigital number, since it uses as much as digits as its factorization.

13332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325222.

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

The square root of 13332421 is about 3651.3587881774. The cubic root of 13332421 is about 237.1208117221.

Adding to 13332421 its reverse (12423331), we get a palindrome (25755752).

The spelling of 13332421 in words is "thirteen million, three hundred thirty-two thousand, four hundred twenty-one".