1155543 has 8 divisors (see below), whose sum is σ = 1607808. Its totient is φ = 736824.

The previous prime is 1155529. The next prime is 1155569. The reversal of 1155543 is 3455511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155543 - 2⁴ = 1155527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8305 + ... + 8442.

It is an arithmetic number, because the mean of its divisors is an integer number (200976).

2^1155543 is an apocalyptic number.

1155543 is a deficient number, since it is larger than the sum of its proper divisors (452265).

1155543 is a wasteful number, since it uses less digits than its factorization.

1155543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16773.

The product of its digits is 1500, while the sum is 24.

The square root of 1155543 is about 1074.9618597885. The cubic root of 1155543 is about 104.9370143790.

Subtracting 1155543 from its reverse (3455511), we obtain a cube (2299968 = 132³).

The spelling of 1155543 in words is "one million, one hundred fifty-five thousand, five hundred forty-three".