1171055091 has 8 divisors (see below), whose sum is σ = 1568286144. Its totient is φ = 777263720.

The previous prime is 1171055089. The next prime is 1171055113. The reversal of 1171055091 is 1905501711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1171055091 - 2¹ = 1171055089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1171055891) 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 7 ways as a sum of consecutive naturals, for example, 859125 + ... + 860486.

It is an arithmetic number, because the mean of its divisors is an integer number (196035768).

Almost surely, 2^1171055091 is an apocalyptic number.

1171055091 is a deficient number, since it is larger than the sum of its proper divisors (397231053).

1171055091 is a wasteful number, since it uses less digits than its factorization.

1171055091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719841.

The product of its (nonzero) digits is 1575, while the sum is 30.

The square root of 1171055091 is about 34220.6822112009. The cubic root of 1171055091 is about 1054.0448940715.

The spelling of 1171055091 in words is "one billion, one hundred seventy-one million, fifty-five thousand, ninety-one".