12738171 has 4 divisors (see below), whose sum is σ = 16984232. Its totient is φ = 8492112.

The previous prime is 12738169. The next prime is 12738211. The reversal of 12738171 is 17183721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17183721 = 3 ⋅5727907.

It is not a de Polignac number, because 12738171 - 2¹ = 12738169 is a prime.

It is a super-2 number, since 2×12738171² = 324522000850482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12738371) 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, 2123026 + ... + 2123031.

It is an arithmetic number, because the mean of its divisors is an integer number (4246058).

Almost surely, 2^12738171 is an apocalyptic number.

12738171 is a deficient number, since it is larger than the sum of its proper divisors (4246061).

12738171 is an equidigital number, since it uses as much as digits as its factorization.

12738171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246060.

The product of its digits is 2352, while the sum is 30.

The square root of 12738171 is about 3569.0574385964. The cubic root of 12738171 is about 233.5441670354.

The spelling of 12738171 in words is "twelve million, seven hundred thirty-eight thousand, one hundred seventy-one".