13221125 has 8 divisors (see below), whose sum is σ = 16500120. Its totient is φ = 10576800.

The previous prime is 13221101. The next prime is 13221137. The reversal of 13221125 is 52112231.

It is a happy number.

13221125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 268324 + 12952801 = 518^2 + 3599^2 .

It is not a de Polignac number, because 13221125 - 2²⁰ = 12172549 is a prime.

It is a super-3 number, since 3×13221125³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52760 + ... + 53009.

It is an arithmetic number, because the mean of its divisors is an integer number (2062515).

Almost surely, 2^13221125 is an apocalyptic number.

It is an amenable number.

13221125 is a deficient number, since it is larger than the sum of its proper divisors (3278995).

13221125 is an equidigital number, since it uses as much as digits as its factorization.

13221125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105784 (or 105774 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 13221125 is about 3636.0864951208. The cubic root of 13221125 is about 236.4591570845.

Adding to 13221125 its reverse (52112231), we get a palindrome (65333356).

The spelling of 13221125 in words is "thirteen million, two hundred twenty-one thousand, one hundred twenty-five".