13432021 has 4 divisors (see below), whose sum is σ = 13865344. Its totient is φ = 12998700.

The previous prime is 13432019. The next prime is 13432033. The reversal of 13432021 is 12023431.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 13432021 - 2¹ = 13432019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13431986 and 13432004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13432061) 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, 216615 + ... + 216676.

It is an arithmetic number, because the mean of its divisors is an integer number (3466336).

Almost surely, 2^13432021 is an apocalyptic number.

It is an amenable number.

13432021 is a deficient number, since it is larger than the sum of its proper divisors (433323).

13432021 is an equidigital number, since it uses as much as digits as its factorization.

13432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433322.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13432021 is about 3664.9721690621. The cubic root of 13432021 is about 237.7098186446.

Adding to 13432021 its reverse (12023431), we get a palindrome (25455452).

It can be divided in two parts, 1343 and 2021, that added together give a square (3364 = 58²).

The spelling of 13432021 in words is "thirteen million, four hundred thirty-two thousand, twenty-one".