12171279 has 8 divisors (see below), whose sum is σ = 16605952. Its totient is φ = 7925400.

The previous prime is 12171277. The next prime is 12171283. The reversal of 12171279 is 97217121.

It is a happy number.

12171279 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12171279 - 2¹ = 12171277 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 (12171277) 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, 47047 + ... + 47304.

It is an arithmetic number, because the mean of its divisors is an integer number (2075744).

Almost surely, 2^12171279 is an apocalyptic number.

12171279 is a deficient number, since it is larger than the sum of its proper divisors (4434673).

12171279 is an equidigital number, since it uses as much as digits as its factorization.

12171279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94397.

The product of its digits is 1764, while the sum is 30.

The square root of 12171279 is about 3488.7360175284. The cubic root of 12171279 is about 230.0269596627.

The spelling of 12171279 in words is "twelve million, one hundred seventy-one thousand, two hundred seventy-nine".