1111541243 has 4 divisors (see below), whose sum is σ = 1176926040. Its totient is φ = 1046156448.

The previous prime is 1111541237. The next prime is 1111541269. The reversal of 1111541243 is 3421451111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3421451111 = 13 ⋅263188547.

It is a cyclic number.

It is not a de Polignac number, because 1111541243 - 2¹⁶ = 1111475707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111541293) 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, 32692373 + ... + 32692406.

It is an arithmetic number, because the mean of its divisors is an integer number (294231510).

Almost surely, 2^1111541243 is an apocalyptic number.

1111541243 is a deficient number, since it is larger than the sum of its proper divisors (65384797).

1111541243 is an equidigital number, since it uses as much as digits as its factorization.

1111541243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65384796.

The product of its digits is 480, while the sum is 23.

The square root of 1111541243 is about 33339.7846873671. The cubic root of 1111541243 is about 1035.8778033873.

Adding to 1111541243 its reverse (3421451111), we get a palindrome (4532992354).

The spelling of 1111541243 in words is "one billion, one hundred eleven million, five hundred forty-one thousand, two hundred forty-three".