1111943 has 4 divisors (see below), whose sum is σ = 1270800. Its totient is φ = 953088.

The previous prime is 1111933. The next prime is 1111949. The reversal of 1111943 is 3491111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3491111 = 13 ⋅268547.

It is a cyclic number.

It is not a de Polignac number, because 1111943 - 2⁸ = 1111687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111949) 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, 79418 + ... + 79431.

It is an arithmetic number, because the mean of its divisors is an integer number (317700).

2^1111943 is an apocalyptic number.

1111943 is a deficient number, since it is larger than the sum of its proper divisors (158857).

1111943 is an equidigital number, since it uses as much as digits as its factorization.

1111943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158856.

The product of its digits is 108, while the sum is 20.

The square root of 1111943 is about 1054.4870791053. The cubic root of 1111943 is about 103.6002591388.

The spelling of 1111943 in words is "one million, one hundred eleven thousand, nine hundred forty-three".