1123057543 has 4 divisors (see below), whose sum is σ = 1128876688. Its totient is φ = 1117238400.

The previous prime is 1123057541. The next prime is 1123057549. The reversal of 1123057543 is 3457503211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3457503211 = 97 ⋅35644363.

It is not a de Polignac number, because 1123057543 - 2¹ = 1123057541 is a prime.

It is a super-2 number, since 2×1123057543² = 2522516489778393698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123057541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2909283 + ... + 2909668.

It is an arithmetic number, because the mean of its divisors is an integer number (282219172).

Almost surely, 2^1123057543 is an apocalyptic number.

1123057543 is a deficient number, since it is larger than the sum of its proper divisors (5819145).

1123057543 is an equidigital number, since it uses as much as digits as its factorization.

1123057543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5819144.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1123057543 is about 33512.0507131390. The cubic root of 1123057543 is about 1039.4429780324.

It can be divided in two parts, 1123057 and 543, that added together give a square (1123600 = 1060²).

The spelling of 1123057543 in words is "one billion, one hundred twenty-three million, fifty-seven thousand, five hundred forty-three".