1165345111 has 4 divisors (see below), whose sum is σ = 1331822992. Its totient is φ = 998867232.

The previous prime is 1165345109. The next prime is 1165345147. The reversal of 1165345111 is 1115435611.

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 1165345111 - 2¹ = 1165345109 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 1165345111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165345711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83238930 + ... + 83238943.

It is an arithmetic number, because the mean of its divisors is an integer number (332955748).

Almost surely, 2^1165345111 is an apocalyptic number.

1165345111 is a deficient number, since it is larger than the sum of its proper divisors (166477881).

1165345111 is an equidigital number, since it uses as much as digits as its factorization.

1165345111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166477880.

The product of its digits is 1800, while the sum is 28.

The square root of 1165345111 is about 34137.1514775325. The cubic root of 1165345111 is about 1052.3289531959.

The spelling of 1165345111 in words is "one billion, one hundred sixty-five million, three hundred forty-five thousand, one hundred eleven".