11581171 has 8 divisors (see below), whose sum is σ = 13259264. Its totient is φ = 9909000.

The previous prime is 11581159. The next prime is 11581177. The reversal of 11581171 is 17118511.

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 11581171 - 2⁷ = 11581043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11581177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4156 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (1657408).

Almost surely, 2^11581171 is an apocalyptic number.

11581171 is a deficient number, since it is larger than the sum of its proper divisors (1678093).

11581171 is an equidigital number, since it uses as much as digits as its factorization.

11581171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961.

The product of its digits is 280, while the sum is 25.

The square root of 11581171 is about 3403.1119581936. Note that the first 3 decimals coincide. The cubic root of 11581171 is about 226.2476922528.

Adding to 11581171 its reverse (17118511), we get a palindrome (28699682).

The spelling of 11581171 in words is "eleven million, five hundred eighty-one thousand, one hundred seventy-one".