13221253 has 4 divisors (see below), whose sum is σ = 13528768. Its totient is φ = 12913740.

The previous prime is 13221233. The next prime is 13221269. The reversal of 13221253 is 35212231.

13221253 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35212231 = 761 ⋅46271.

It is a cyclic number.

It is not a de Polignac number, because 13221253 - 2⁹ = 13220741 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 13221253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221233) 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, 153693 + ... + 153778.

It is an arithmetic number, because the mean of its divisors is an integer number (3382192).

Almost surely, 2^13221253 is an apocalyptic number.

It is an amenable number.

13221253 is a deficient number, since it is larger than the sum of its proper divisors (307515).

13221253 is an equidigital number, since it uses as much as digits as its factorization.

13221253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307514.

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

The square root of 13221253 is about 3636.1040964197. The cubic root of 13221253 is about 236.4599201732.

Adding to 13221253 its reverse (35212231), we get a palindrome (48433484).

The spelling of 13221253 in words is "thirteen million, two hundred twenty-one thousand, two hundred fifty-three".