12447271 has 4 divisors (see below), whose sum is σ = 12462192. Its totient is φ = 12432352.

The previous prime is 12447269. The next prime is 12447277. The reversal of 12447271 is 17274421.

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 12447271 - 2¹ = 12447269 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 (12447277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6130 + ... + 7903.

It is an arithmetic number, because the mean of its divisors is an integer number (3115548).

Almost surely, 2^12447271 is an apocalyptic number.

12447271 is a deficient number, since it is larger than the sum of its proper divisors (14921).

12447271 is an equidigital number, since it uses as much as digits as its factorization.

12447271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14920.

The product of its digits is 3136, while the sum is 28.

The square root of 12447271 is about 3528.0690185993. The cubic root of 12447271 is about 231.7526532995.

It can be divided in two parts, 1244 and 7271, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 12447271 in words is "twelve million, four hundred forty-seven thousand, two hundred seventy-one".