1115542043 has 16 divisors (see below), whose sum is σ = 1438767360. Its totient is φ = 839277600.

The previous prime is 1115542033. The next prime is 1115542049. The reversal of 1115542043 is 3402455111.

It is not a de Polignac number, because 1115542043 - 2²² = 1111347739 is a prime.

It is a super-2 number, since 2×1115542043² = 2488868099401227698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115542049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247553 + ... + 252018.

It is an arithmetic number, because the mean of its divisors is an integer number (89922960).

Almost surely, 2^1115542043 is an apocalyptic number.

1115542043 is a deficient number, since it is larger than the sum of its proper divisors (323225317).

1115542043 is a wasteful number, since it uses less digits than its factorization.

1115542043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499618.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1115542043 is about 33399.7311815529. The cubic root of 1115542043 is about 1037.1191361113.

Adding to 1115542043 its reverse (3402455111), we get a palindrome (4517997154).

The spelling of 1115542043 in words is "one billion, one hundred fifteen million, five hundred forty-two thousand, forty-three".