1123542203 has 16 divisors (see below), whose sum is σ = 1350451200. Its totient is φ = 913895136.

The previous prime is 1123542179. The next prime is 1123542239. The reversal of 1123542203 is 3022453211.

It is not a de Polignac number, because 1123542203 - 2⁶ = 1123542139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1123542263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7028 + ... + 47921.

It is an arithmetic number, because the mean of its divisors is an integer number (84403200).

Almost surely, 2^1123542203 is an apocalyptic number.

1123542203 is a deficient number, since it is larger than the sum of its proper divisors (226908997).

1123542203 is a wasteful number, since it uses less digits than its factorization.

1123542203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55106.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1123542203 is about 33519.2810632925. The cubic root of 1123542203 is about 1039.5924817942.

Adding to 1123542203 its reverse (3022453211), we get a palindrome (4145995414).

The spelling of 1123542203 in words is "one billion, one hundred twenty-three million, five hundred forty-two thousand, two hundred three".