1170891 has 6 divisors (see below), whose sum is σ = 1691300. Its totient is φ = 780588.

The previous prime is 1170863. The next prime is 1170899. The reversal of 1170891 is 1980711.

It is a de Polignac number, because none of the positive numbers 2^k-1170891 is a prime.

It is a Duffinian number.

1170891 is a modest number, since divided by 891 gives 117 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1170899) 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 5 ways as a sum of consecutive naturals, for example, 65041 + ... + 65058.

2^1170891 is an apocalyptic number.

1170891 is a deficient number, since it is larger than the sum of its proper divisors (520409).

1170891 is a wasteful number, since it uses less digits than its factorization.

1170891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130105 (or 130102 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1170891 is about 1082.0771691520. The cubic root of 1170891 is about 105.3995660020.

The spelling of 1170891 in words is "one million, one hundred seventy thousand, eight hundred ninety-one".