1111243143 has 16 divisors (see below), whose sum is σ = 1530381312. Its totient is φ = 716496000.

The previous prime is 1111243129. The next prime is 1111243153. The reversal of 1111243143 is 3413421111.

It is not a de Polignac number, because 1111243143 - 2⁶ = 1111243079 is a prime.

It is a super-3 number, since 3×1111243143³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111243153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233023 + ... + 237743.

It is an arithmetic number, because the mean of its divisors is an integer number (95648832).

Almost surely, 2^1111243143 is an apocalyptic number.

1111243143 is a deficient number, since it is larger than the sum of its proper divisors (419138169).

1111243143 is a wasteful number, since it uses less digits than its factorization.

1111243143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286.

The product of its digits is 288, while the sum is 21.

The square root of 1111243143 is about 33335.3137528357. The cubic root of 1111243143 is about 1035.7851924041.

Adding to 1111243143 its reverse (3413421111), we get a palindrome (4524664254).

The spelling of 1111243143 in words is "one billion, one hundred eleven million, two hundred forty-three thousand, one hundred forty-three".