1151162171 has 4 divisors (see below), whose sum is σ = 1170033744. Its totient is φ = 1132290600.

The previous prime is 1151162149. The next prime is 1151162183. The reversal of 1151162171 is 1712611511.

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 1151162171 - 2¹⁸ = 1150900027 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 1151162171.

It is not an unprimeable number, because it can be changed into a prime (1151162141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9435695 + ... + 9435816.

It is an arithmetic number, because the mean of its divisors is an integer number (292508436).

Almost surely, 2^1151162171 is an apocalyptic number.

1151162171 is a deficient number, since it is larger than the sum of its proper divisors (18871573).

1151162171 is an equidigital number, since it uses as much as digits as its factorization.

1151162171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871572.

The product of its digits is 420, while the sum is 26.

The square root of 1151162171 is about 33928.7808652182. The cubic root of 1151162171 is about 1048.0423602689.

Adding to 1151162171 its reverse (1712611511), we get a palindrome (2863773682).

The spelling of 1151162171 in words is "one billion, one hundred fifty-one million, one hundred sixty-two thousand, one hundred seventy-one".