1151165 has 4 divisors (see below), whose sum is σ = 1381404. Its totient is φ = 920928.

The previous prime is 1151159. The next prime is 1151167. The reversal of 1151165 is 5611511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 813604 + 337561 = 902^2 + 581^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151165 - 2⁸ = 1150909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151167) 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, 115112 + ... + 115121.

It is an arithmetic number, because the mean of its divisors is an integer number (345351).

2^1151165 is an apocalyptic number.

It is an amenable number.

1151165 is a deficient number, since it is larger than the sum of its proper divisors (230239).

1151165 is an equidigital number, since it uses as much as digits as its factorization.

1151165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230238.

The product of its digits is 150, while the sum is 20.

The square root of 1151165 is about 1072.9235760295. The cubic root of 1151165 is about 104.8043218795.

Adding to 1151165 its reverse (5611511), we get a palindrome (6762676).

The spelling of 1151165 in words is "one million, one hundred fifty-one thousand, one hundred sixty-five".