1155559 has 4 divisors (see below), whose sum is σ = 1177416. Its totient is φ = 1133704.

The previous prime is 1155529. The next prime is 1155569. The reversal of 1155559 is 9555511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1155559 - 2⁵ = 1155527 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1155559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155529) 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 3 ways as a sum of consecutive naturals, for example, 10849 + ... + 10954.

It is an arithmetic number, because the mean of its divisors is an integer number (294354).

2^1155559 is an apocalyptic number.

1155559 is a deficient number, since it is larger than the sum of its proper divisors (21857).

1155559 is an equidigital number, since it uses as much as digits as its factorization.

1155559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21856.

The product of its digits is 5625, while the sum is 31.

The square root of 1155559 is about 1074.9693018873. The cubic root of 1155559 is about 104.9374987067.

The spelling of 1155559 in words is "one million, one hundred fifty-five thousand, five hundred fifty-nine".