13405123 has 2 divisors, whose sum is σ = 13405124. Its totient is φ = 13405122.

The previous prime is 13405111. The next prime is 13405151. The reversal of 13405123 is 32150431.

13405123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13405123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13405123.

It is not a weakly prime, because it can be changed into another prime (13405103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702561 + 6702562.

It is an arithmetic number, because the mean of its divisors is an integer number (6702562).

Almost surely, 2^13405123 is an apocalyptic number.

13405123 is a deficient number, since it is larger than the sum of its proper divisors (1).

13405123 is an equidigital number, since it uses as much as digits as its factorization.

13405123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13405123 is about 3661.3007251522. The cubic root of 13405123 is about 237.5510390770.

Adding to 13405123 its reverse (32150431), we get a palindrome (45555554).

The spelling of 13405123 in words is "thirteen million, four hundred five thousand, one hundred twenty-three".