12471905 has 4 divisors (see below), whose sum is σ = 14966292. Its totient is φ = 9977520.

The previous prime is 12471887. The next prime is 12471917. The reversal of 12471905 is 50917421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8567329 + 3904576 = 2927^2 + 1976^2 .

It is not a de Polignac number, because 12471905 - 2⁶ = 12471841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1247186 + ... + 1247195.

It is an arithmetic number, because the mean of its divisors is an integer number (3741573).

Almost surely, 2^12471905 is an apocalyptic number.

It is an amenable number.

12471905 is a deficient number, since it is larger than the sum of its proper divisors (2494387).

12471905 is an equidigital number, since it uses as much as digits as its factorization.

12471905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494386.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 12471905 is about 3531.5584378571. The cubic root of 12471905 is about 231.9054373337.

The spelling of 12471905 in words is "twelve million, four hundred seventy-one thousand, nine hundred five".