1125042543 has 12 divisors (see below), whose sum is σ = 1626303328. Its totient is φ = 749455200.

The previous prime is 1125042511. The next prime is 1125042547. The reversal of 1125042543 is 3452405211.

1125042543 is a `hidden beast` number, since 112 + 5 + 0 + 4 + 2 + 543 = 666.

It is not a de Polignac number, because 1125042543 - 2⁵ = 1125042511 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 (1125042547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35158 + ... + 59043.

Almost surely, 2^1125042543 is an apocalyptic number.

1125042543 is a deficient number, since it is larger than the sum of its proper divisors (501260785).

1125042543 is a wasteful number, since it uses less digits than its factorization.

1125042543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95534 (or 95531 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1125042543 is about 33541.6538501011. The cubic root of 1125042543 is about 1040.0550214357.

Adding to 1125042543 its reverse (3452405211), we get a palindrome (4577447754).

The spelling of 1125042543 in words is "one billion, one hundred twenty-five million, forty-two thousand, five hundred forty-three".