11992271 has 4 divisors (see below), whose sum is σ = 12046272. Its totient is φ = 11938272.

The previous prime is 11992243. The next prime is 11992291. The reversal of 11992271 is 17229911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11992271 - 2¹⁰ = 11991247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11992231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26666 + ... + 27111.

It is an arithmetic number, because the mean of its divisors is an integer number (3011568).

Almost surely, 2^11992271 is an apocalyptic number.

11992271 is a deficient number, since it is larger than the sum of its proper divisors (54001).

11992271 is an equidigital number, since it uses as much as digits as its factorization.

11992271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54000.

The product of its digits is 2268, while the sum is 32.

The square root of 11992271 is about 3462.9858503898. The cubic root of 11992271 is about 228.8936851964.

The spelling of 11992271 in words is "eleven million, nine hundred ninety-two thousand, two hundred seventy-one".