11992171 has 2 divisors, whose sum is σ = 11992172. Its totient is φ = 11992170.

The previous prime is 11992159. The next prime is 11992193. The reversal of 11992171 is 17129911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11992171 - 2⁵ = 11992139 is a prime.

It is not a weakly prime, because it can be changed into another prime (11992111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5996085 + 5996086.

It is an arithmetic number, because the mean of its divisors is an integer number (5996086).

Almost surely, 2^11992171 is an apocalyptic number.

11992171 is a deficient number, since it is larger than the sum of its proper divisors (1).

11992171 is an equidigital number, since it uses as much as digits as its factorization.

11992171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 31.

The square root of 11992171 is about 3462.9714119525. The cubic root of 11992171 is about 228.8930489691.

The spelling of 11992171 in words is "eleven million, nine hundred ninety-two thousand, one hundred seventy-one".