13227145 has 4 divisors (see below), whose sum is σ = 15872580. Its totient is φ = 10581712.

The previous prime is 13227143. The next prime is 13227197. The reversal of 13227145 is 54172231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54172231 = 127 ⋅426553.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 9114361 = 2028^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 13227145 - 2¹ = 13227143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13227143) 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, 1322710 + ... + 1322719.

It is an arithmetic number, because the mean of its divisors is an integer number (3968145).

Almost surely, 2^13227145 is an apocalyptic number.

It is an amenable number.

13227145 is a deficient number, since it is larger than the sum of its proper divisors (2645435).

13227145 is an equidigital number, since it uses as much as digits as its factorization.

13227145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645434.

The product of its digits is 1680, while the sum is 25.

The square root of 13227145 is about 3636.9142140007. The cubic root of 13227145 is about 236.4950407714.

Adding to 13227145 its reverse (54172231), we get a palindrome (67399376).

The spelling of 13227145 in words is "thirteen million, two hundred twenty-seven thousand, one hundred forty-five".