13040123 has 2 divisors, whose sum is σ = 13040124. Its totient is φ = 13040122.

The previous prime is 13040117. The next prime is 13040141. The reversal of 13040123 is 32104031.

It is a weak prime.

It is an emirp because it is prime and its reverse (32104031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13040123 - 2⁴ = 13040107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13040098 and 13040107.

It is not a weakly prime, because it can be changed into another prime (13040323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6520061 + 6520062.

It is an arithmetic number, because the mean of its divisors is an integer number (6520062).

Almost surely, 2^13040123 is an apocalyptic number.

13040123 is a deficient number, since it is larger than the sum of its proper divisors (1).

13040123 is an equidigital number, since it uses as much as digits as its factorization.

13040123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13040123 is about 3611.1110478632. Note that the first 3 decimals coincide. The cubic root of 13040123 is about 235.3751244351.

Adding to 13040123 its reverse (32104031), we get a palindrome (45144154).

The spelling of 13040123 in words is "thirteen million, forty thousand, one hundred twenty-three".