13540043 has 4 divisors (see below), whose sum is σ = 14770968. Its totient is φ = 12309120.

The previous prime is 13540001. The next prime is 13540073. The reversal of 13540043 is 34004531.

13540043 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34004531 = 11 ⋅3091321.

It is a cyclic number.

It is not a de Polignac number, because 13540043 - 2⁶ = 13539979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13539997 and 13540024.

It is not an unprimeable number, because it can be changed into a prime (13540073) 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, 615446 + ... + 615467.

It is an arithmetic number, because the mean of its divisors is an integer number (3692742).

Almost surely, 2^13540043 is an apocalyptic number.

13540043 is a deficient number, since it is larger than the sum of its proper divisors (1230925).

13540043 is a wasteful number, since it uses less digits than its factorization.

13540043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230924.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 13540043 is about 3679.6797414993. The cubic root of 13540043 is about 238.3453487457.

Adding to 13540043 its reverse (34004531), we get a palindrome (47544574).

The spelling of 13540043 in words is "thirteen million, five hundred forty thousand, forty-three".