1111242243 has 4 divisors (see below), whose sum is σ = 1481656328. Its totient is φ = 740828160.

The previous prime is 1111242199. The next prime is 1111242259. The reversal of 1111242243 is 3422421111.

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

It is not a de Polignac number, because 1111242243 - 2¹² = 1111238147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111242283) 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, 185207038 + ... + 185207043.

It is an arithmetic number, because the mean of its divisors is an integer number (370414082).

Almost surely, 2^1111242243 is an apocalyptic number.

1111242243 is a deficient number, since it is larger than the sum of its proper divisors (370414085).

1111242243 is an equidigital number, since it uses as much as digits as its factorization.

1111242243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370414084.

The product of its digits is 384, while the sum is 21.

The square root of 1111242243 is about 33335.3002536350. The cubic root of 1111242243 is about 1035.7849127752.

Adding to 1111242243 its reverse (3422421111), we get a palindrome (4533663354).

The spelling of 1111242243 in words is "one billion, one hundred eleven million, two hundred forty-two thousand, two hundred forty-three".