13352021 has 4 divisors (see below), whose sum is σ = 14137452. Its totient is φ = 12566592.

The previous prime is 13351991. The next prime is 13352023. The reversal of 13352021 is 12025331.

13352021 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: 12025331 = 431 ⋅27901.

It can be written as a sum of positive squares in 2 ways, for example, as 7349521 + 6002500 = 2711^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 13352021 - 2²² = 9157717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 785413 = 13352021 / (1 + 3 + 3 + 5 + 2 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13352023) 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, 392690 + ... + 392723.

It is an arithmetic number, because the mean of its divisors is an integer number (3534363).

Almost surely, 2^13352021 is an apocalyptic number.

It is an amenable number.

13352021 is a deficient number, since it is larger than the sum of its proper divisors (785431).

13352021 is an equidigital number, since it uses as much as digits as its factorization.

13352021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785430.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 13352021 is about 3654.0417348465. The cubic root of 13352021 is about 237.2369519766.

Adding to 13352021 its reverse (12025331), we get a palindrome (25377352).

The spelling of 13352021 in words is "thirteen million, three hundred fifty-two thousand, twenty-one".