11971171 has 8 divisors (see below), whose sum is σ = 12423600. Its totient is φ = 11521440.

The previous prime is 11971117. The next prime is 11971199. The reversal of 11971171 is 17117911.

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 11971171 - 2⁹ = 11970659 is a prime.

It is a super-2 number, since 2×11971171² = 286617870222482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11971871) 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, 14356 + ... + 15166.

It is an arithmetic number, because the mean of its divisors is an integer number (1552950).

Almost surely, 2^11971171 is an apocalyptic number.

11971171 is a deficient number, since it is larger than the sum of its proper divisors (452429).

11971171 is an equidigital number, since it uses as much as digits as its factorization.

11971171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349.

The product of its digits is 441, while the sum is 28.

The square root of 11971171 is about 3459.9380052249. The cubic root of 11971171 is about 228.7593627908.

The spelling of 11971171 in words is "eleven million, nine hundred seventy-one thousand, one hundred seventy-one".