11591171 has 4 divisors (see below), whose sum is σ = 11598552. Its totient is φ = 11583792.

The previous prime is 11591147. The next prime is 11591183. The reversal of 11591171 is 17119511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17119511 = 487 ⋅35153.

It is a cyclic number.

It is not a de Polignac number, because 11591171 - 2¹⁸ = 11329027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11591171.

It is not an unprimeable number, because it can be changed into a prime (11591131) 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 3 ways as a sum of consecutive naturals, for example, 290 + ... + 4823.

It is an arithmetic number, because the mean of its divisors is an integer number (2899638).

Almost surely, 2^11591171 is an apocalyptic number.

11591171 is a deficient number, since it is larger than the sum of its proper divisors (7381).

11591171 is an equidigital number, since it uses as much as digits as its factorization.

11591171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380.

The product of its digits is 315, while the sum is 26.

The square root of 11591171 is about 3404.5808846318. The cubic root of 11591171 is about 226.3127929248.

The spelling of 11591171 in words is "eleven million, five hundred ninety-one thousand, one hundred seventy-one".