13140224 has 18 divisors (see below), whose sum is σ = 26229630. Its totient is φ = 6569984.

The previous prime is 13140221. The next prime is 13140271. The reversal of 13140224 is 42204131.

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 409600 = 3568^2 + 640^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13140221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25409 + ... + 25920.

Almost surely, 2^13140224 is an apocalyptic number.

It is an amenable number.

13140224 is a deficient number, since it is larger than the sum of its proper divisors (13089406).

13140224 is an frugal number, since it uses more digits than its factorization.

13140224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51345 (or 51331 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 13140224 is about 3624.9446892332. The cubic root of 13140224 is about 235.9758665353.

Adding to 13140224 its reverse (42204131), we get a palindrome (55344355).

The spelling of 13140224 in words is "thirteen million, one hundred forty thousand, two hundred twenty-four".