1155565 has 8 divisors (see below), whose sum is σ = 1393920. Its totient is φ = 919632.

The previous prime is 1155529. The next prime is 1155569. The reversal of 1155565 is 5655511.

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

It is a cyclic number.

It is not a de Polignac number, because 1155565 - 2⁷ = 1155437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155569) 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, 712 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (174240).

2^1155565 is an apocalyptic number.

It is an amenable number.

1155565 is a deficient number, since it is larger than the sum of its proper divisors (238355).

1155565 is an equidigital number, since it uses as much as digits as its factorization.

1155565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211.

The product of its digits is 3750, while the sum is 28.

The square root of 1155565 is about 1074.9720926610. The cubic root of 1155565 is about 104.9376803284.

The spelling of 1155565 in words is "one million, one hundred fifty-five thousand, five hundred sixty-five".