13543123 has 4 divisors (see below), whose sum is σ = 14774328. Its totient is φ = 12311920.

The previous prime is 13543111. The next prime is 13543133. The reversal of 13543123 is 32134531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13543123 - 2⁵ = 13543091 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13543094 and 13543103.

It is not an unprimeable number, because it can be changed into a prime (13543133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615586 + ... + 615607.

It is an arithmetic number, because the mean of its divisors is an integer number (3693582).

Almost surely, 2^13543123 is an apocalyptic number.

13543123 is a deficient number, since it is larger than the sum of its proper divisors (1231205).

13543123 is a wasteful number, since it uses less digits than its factorization.

13543123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231204.

The product of its digits is 1080, while the sum is 22.

The square root of 13543123 is about 3680.0982323846. The cubic root of 13543123 is about 238.3634197868.

Adding to 13543123 its reverse (32134531), we get a palindrome (45677654).

The spelling of 13543123 in words is "thirteen million, five hundred forty-three thousand, one hundred twenty-three".