1166191 has 8 divisors (see below), whose sum is σ = 1268960. Its totient is φ = 1065312.

The previous prime is 1166153. The next prime is 1166213. The reversal of 1166191 is 1916611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1006 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (158620).

2^1166191 is an apocalyptic number.

1166191 is a deficient number, since it is larger than the sum of its proper divisors (102769).

1166191 is a wasteful number, since it uses less digits than its factorization.

1166191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945.

The product of its digits is 324, while the sum is 25.

The square root of 1166191 is about 1079.9032364059. The cubic root of 1166191 is about 105.2583509603.

The spelling of 1166191 in words is "one million, one hundred sixty-six thousand, one hundred ninety-one".