13372021 has 4 divisors (see below), whose sum is σ = 14400652. Its totient is φ = 12343392.

The previous prime is 13372003. The next prime is 13372043. The reversal of 13372021 is 12027331.

13372021 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: 12027331 = 37 ⋅325063.

It can be written as a sum of positive squares in 2 ways, for example, as 2283121 + 11088900 = 1511^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 13372021 - 2⁵ = 13371989 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 13372021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13372001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514296 + ... + 514321.

It is an arithmetic number, because the mean of its divisors is an integer number (3600163).

Almost surely, 2^13372021 is an apocalyptic number.

It is an amenable number.

13372021 is a deficient number, since it is larger than the sum of its proper divisors (1028631).

13372021 is a wasteful number, since it uses less digits than its factorization.

13372021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028630.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 13372021 is about 3656.7774064058. Note that the first 3 decimals coincide. The cubic root of 13372021 is about 237.3553453384.

Adding to 13372021 its reverse (12027331), we get a palindrome (25399352).

The spelling of 13372021 in words is "thirteen million, three hundred seventy-two thousand, twenty-one".