1123657143 has 32 divisors (see below), whose sum is σ = 1819399680. Its totient is φ = 604264320.

The previous prime is 1123657141. The next prime is 1123657163. The reversal of 1123657143 is 3417563211.

It is not a de Polignac number, because 1123657143 - 2¹ = 1123657141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123657141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97728 + ... + 108618.

It is an arithmetic number, because the mean of its divisors is an integer number (56856240).

Almost surely, 2^1123657143 is an apocalyptic number.

1123657143 is a deficient number, since it is larger than the sum of its proper divisors (695742537).

1123657143 is an equidigital number, since it uses as much as digits as its factorization.

1123657143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952 (or 10918 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 1123657143 is about 33520.9955550249. The cubic root of 1123657143 is about 1039.6279311926.

The spelling of 1123657143 in words is "one billion, one hundred twenty-three million, six hundred fifty-seven thousand, one hundred forty-three".