1240111143 has 6 divisors (see below), whose sum is σ = 1791271664. Its totient is φ = 826740756.

The previous prime is 1240111139. The next prime is 1240111153. The reversal of 1240111143 is 3411110421.

It is not a de Polignac number, because 1240111143 - 2² = 1240111139 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 (1240111153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68895055 + ... + 68895072.

Almost surely, 2^1240111143 is an apocalyptic number.

1240111143 is a deficient number, since it is larger than the sum of its proper divisors (551160521).

1240111143 is a wasteful number, since it uses less digits than its factorization.

1240111143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137790133 (or 137790130 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1240111143 is about 35215.2118125108. The cubic root of 1240111143 is about 1074.3691681604.

Adding to 1240111143 its reverse (3411110421), we get a palindrome (4651221564).

The spelling of 1240111143 in words is "one billion, two hundred forty million, one hundred eleven thousand, one hundred forty-three".