13534021 has 2 divisors, whose sum is σ = 13534022. Its totient is φ = 13534020.

The previous prime is 13534007. The next prime is 13534033. The reversal of 13534021 is 12043531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 3101121 = 3230^2 + 1761^2 .

It is a cyclic number.

It is not a de Polignac number, because 13534021 - 2⁷ = 13533893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13534021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13534621) 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 as a sum of consecutive naturals, namely, 6767010 + 6767011.

It is an arithmetic number, because the mean of its divisors is an integer number (6767011).

Almost surely, 2^13534021 is an apocalyptic number.

It is an amenable number.

13534021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13534021 is an equidigital number, since it uses as much as digits as its factorization.

13534021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13534021 is about 3678.8613727620. The cubic root of 13534021 is about 238.3100084215.

Adding to 13534021 its reverse (12043531), we get a palindrome (25577552).

The spelling of 13534021 in words is "thirteen million, five hundred thirty-four thousand, twenty-one".