13111243 has 4 divisors (see below), whose sum is σ = 13127400. Its totient is φ = 13095088.

The previous prime is 13111237. The next prime is 13111271. The reversal of 13111243 is 34211131.

13111243 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 13111243 - 2⁵ = 13111211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111643) 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, 6793 + ... + 8506.

It is an arithmetic number, because the mean of its divisors is an integer number (3281850).

Almost surely, 2^13111243 is an apocalyptic number.

13111243 is a deficient number, since it is larger than the sum of its proper divisors (16157).

13111243 is an equidigital number, since it uses as much as digits as its factorization.

13111243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16156.

The product of its digits is 72, while the sum is 16.

The square root of 13111243 is about 3620.9450423888. The cubic root of 13111243 is about 235.8022558351.

Adding to 13111243 its reverse (34211131), we get a palindrome (47322374).

The spelling of 13111243 in words is "thirteen million, one hundred eleven thousand, two hundred forty-three".