1155065 has 16 divisors (see below), whose sum is σ = 1492992. Its totient is φ = 854784.

The previous prime is 1155061. The next prime is 1155071. The reversal of 1155065 is 5605511.

It is a cyclic number.

It is not a de Polignac number, because 1155065 - 2² = 1155061 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 1155065.

It is not an unprimeable number, because it can be changed into a prime (1155061) 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, 9032 + ... + 9158.

It is an arithmetic number, because the mean of its divisors is an integer number (93312).

2^1155065 is an apocalyptic number.

It is an amenable number.

1155065 is a deficient number, since it is larger than the sum of its proper divisors (337927).

1155065 is a wasteful number, since it uses less digits than its factorization.

1155065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1155065 is about 1074.7395033216. The cubic root of 1155065 is about 104.9225430263.

It can be divided in two parts, 115506 and 5, that added together give a palindrome (115511).

The spelling of 1155065 in words is "one million, one hundred fifty-five thousand, sixty-five".