12738065 has 4 divisors (see below), whose sum is σ = 15285684. Its totient is φ = 10190448.

The previous prime is 12738059. The next prime is 12738119. The reversal of 12738065 is 56083721.

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: 56083721 = 271 ⋅206951.

It can be written as a sum of positive squares in 2 ways, for example, as 1635841 + 11102224 = 1279^2 + 3332^2 .

It is a cyclic number.

It is not a de Polignac number, because 12738065 - 2⁶ = 12738001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273802 + ... + 1273811.

It is an arithmetic number, because the mean of its divisors is an integer number (3821421).

Almost surely, 2^12738065 is an apocalyptic number.

It is an amenable number.

12738065 is a deficient number, since it is larger than the sum of its proper divisors (2547619).

12738065 is an equidigital number, since it uses as much as digits as its factorization.

12738065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547618.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 12738065 is about 3569.0425887064. The cubic root of 12738065 is about 233.5435192252.

The spelling of 12738065 in words is "twelve million, seven hundred thirty-eight thousand, sixty-five".