12199271 has 4 divisors (see below), whose sum is σ = 13942032. Its totient is φ = 10456512.

The previous prime is 12199261. The next prime is 12199279. The reversal of 12199271 is 17299121.

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 12199271 - 2¹⁸ = 11937127 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 (12199279) 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 3 ways as a sum of consecutive naturals, for example, 871370 + ... + 871383.

It is an arithmetic number, because the mean of its divisors is an integer number (3485508).

Almost surely, 2^12199271 is an apocalyptic number.

12199271 is a deficient number, since it is larger than the sum of its proper divisors (1742761).

12199271 is an equidigital number, since it uses as much as digits as its factorization.

12199271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742760.

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

The square root of 12199271 is about 3492.7454817092. The cubic root of 12199271 is about 230.2031664194.

The spelling of 12199271 in words is "twelve million, one hundred ninety-nine thousand, two hundred seventy-one".