12279271 has 4 divisors (see below), whose sum is σ = 12292192. Its totient is φ = 12266352.

The previous prime is 12279247. The next prime is 12279283. The reversal of 12279271 is 17297221.

It is a happy number.

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 12279271 - 2¹³ = 12271079 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 (12274271) 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, 4911 + ... + 6976.

It is an arithmetic number, because the mean of its divisors is an integer number (3073048).

Almost surely, 2^12279271 is an apocalyptic number.

12279271 is a deficient number, since it is larger than the sum of its proper divisors (12921).

12279271 is a wasteful number, since it uses less digits than its factorization.

12279271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12920.

The product of its digits is 3528, while the sum is 31.

The square root of 12279271 is about 3504.1790764743. The cubic root of 12279271 is about 230.7052768277.

The spelling of 12279271 in words is "twelve million, two hundred seventy-nine thousand, two hundred seventy-one".