1155043 has 4 divisors (see below), whose sum is σ = 1174680. Its totient is φ = 1135408.

The previous prime is 1155019. The next prime is 1155053. The reversal of 1155043 is 3405511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3405511 = 239 ⋅14249.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155043.

It is not an unprimeable number, because it can be changed into a prime (1155053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9730 + ... + 9847.

It is an arithmetic number, because the mean of its divisors is an integer number (293670).

2^1155043 is an apocalyptic number.

1155043 is a deficient number, since it is larger than the sum of its proper divisors (19637).

1155043 is an equidigital number, since it uses as much as digits as its factorization.

1155043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19636.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1155043 is about 1074.7292682346. The cubic root of 1155043 is about 104.9218768847.

The spelling of 1155043 in words is "one million, one hundred fifty-five thousand, forty-three".