13040128 has 20 divisors (see below), whose sum is σ = 26055810. Its totient is φ = 6519808.

The previous prime is 13040123. The next prime is 13040141. The reversal of 13040128 is 82104031.

It can be written as a sum of positive squares in only one way, i.e., 9535744 + 3504384 = 3088^2 + 1872^2 .

It is not an unprimeable number, because it can be changed into a prime (13040123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12223 + ... + 13246.

Almost surely, 2^13040128 is an apocalyptic number.

It is an amenable number.

13040128 is a deficient number, since it is larger than the sum of its proper divisors (13015682).

13040128 is an frugal number, since it uses more digits than its factorization.

13040128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25487 (or 25471 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 13040128 is about 3611.1117401709. Note that the first 3 decimals coincide. The cubic root of 13040128 is about 235.3751545185.

Adding to 13040128 its reverse (82104031), we get a palindrome (95144159).

The spelling of 13040128 in words is "thirteen million, forty thousand, one hundred twenty-eight".