1171885171 has 4 divisors (see below), whose sum is σ = 1176026392. Its totient is φ = 1167743952.

The previous prime is 1171885163. The next prime is 1171885193. The reversal of 1171885171 is 1715881711.

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 1171885171 - 2³ = 1171885163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171885151) 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, 2070186 + ... + 2070751.

It is an arithmetic number, because the mean of its divisors is an integer number (294006598).

Almost surely, 2^1171885171 is an apocalyptic number.

1171885171 is a deficient number, since it is larger than the sum of its proper divisors (4141221).

1171885171 is an equidigital number, since it uses as much as digits as its factorization.

1171885171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141220.

The product of its digits is 15680, while the sum is 40.

The square root of 1171885171 is about 34232.8084007141. The cubic root of 1171885171 is about 1054.2938817708.

The spelling of 1171885171 in words is "one billion, one hundred seventy-one million, eight hundred eighty-five thousand, one hundred seventy-one".