1171791 has 6 divisors (see below), whose sum is σ = 1692600. Its totient is φ = 781188.

The previous prime is 1171789. The next prime is 1171801. The reversal of 1171791 is 1971711.

It is not a de Polignac number, because 1171791 - 2¹ = 1171789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65091 + ... + 65108.

It is an arithmetic number, because the mean of its divisors is an integer number (282100).

2^1171791 is an apocalyptic number.

1171791 is a deficient number, since it is larger than the sum of its proper divisors (520809).

1171791 is a wasteful number, since it uses less digits than its factorization.

1171791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130205 (or 130202 counting only the distinct ones).

The product of its digits is 441, while the sum is 27.

The square root of 1171791 is about 1082.4929560972. The cubic root of 1171791 is about 105.4265640503.

The spelling of 1171791 in words is "one million, one hundred seventy-one thousand, seven hundred ninety-one".