12478271 has 4 divisors (see below), whose sum is σ = 13438152. Its totient is φ = 11518392.

The previous prime is 12478261. The next prime is 12478273. The reversal of 12478271 is 17287421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17287421 = 23 ⋅751627.

It is a cyclic number.

It is not a de Polignac number, because 12478271 - 2¹⁴ = 12461887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12478273) 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, 479921 + ... + 479946.

It is an arithmetic number, because the mean of its divisors is an integer number (3359538).

Almost surely, 2^12478271 is an apocalyptic number.

12478271 is a deficient number, since it is larger than the sum of its proper divisors (959881).

12478271 is an equidigital number, since it uses as much as digits as its factorization.

12478271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959880.

The product of its digits is 6272, while the sum is 32.

The square root of 12478271 is about 3532.4596246808. The cubic root of 12478271 is about 231.9448875728.

The spelling of 12478271 in words is "twelve million, four hundred seventy-eight thousand, two hundred seventy-one".