12278271 has 4 divisors (see below), whose sum is σ = 16371032. Its totient is φ = 8185512.

The previous prime is 12278269. The next prime is 12278317. The reversal of 12278271 is 17287221.

It is a happy number.

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

It is not a de Polignac number, because 12278271 - 2¹ = 12278269 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 (12278221) 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, 2046376 + ... + 2046381.

It is an arithmetic number, because the mean of its divisors is an integer number (4092758).

Almost surely, 2^12278271 is an apocalyptic number.

12278271 is a deficient number, since it is larger than the sum of its proper divisors (4092761).

12278271 is an equidigital number, since it uses as much as digits as its factorization.

12278271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092760.

The product of its digits is 3136, while the sum is 30.

The square root of 12278271 is about 3504.0363867974. The cubic root of 12278271 is about 230.6990139277.

The spelling of 12278271 in words is "twelve million, two hundred seventy-eight thousand, two hundred seventy-one".