13233421 has 4 divisors (see below), whose sum is σ = 13241632. Its totient is φ = 13225212.

The previous prime is 13233413. The next prime is 13233433. The reversal of 13233421 is 12433231.

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.

It is a cyclic number.

It is not a de Polignac number, because 13233421 - 2³ = 13233413 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 (13293421) 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, 801 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (3310408).

Almost surely, 2^13233421 is an apocalyptic number.

It is an amenable number.

13233421 is a deficient number, since it is larger than the sum of its proper divisors (8211).

13233421 is an equidigital number, since it uses as much as digits as its factorization.

13233421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210.

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

The square root of 13233421 is about 3637.7769310391. The cubic root of 13233421 is about 236.5324388188.

Adding to 13233421 its reverse (12433231), we get a palindrome (25666652).

It can be divided in two parts, 132334 and 21, that added together give a triangular number (132355 = T₅₁₄).

The spelling of 13233421 in words is "thirteen million, two hundred thirty-three thousand, four hundred twenty-one".