12750065 has 4 divisors (see below), whose sum is σ = 15300084. Its totient is φ = 10200048.

The previous prime is 12750011. The next prime is 12750071. The reversal of 12750065 is 56005721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56005721 = 197 ⋅284293.

It can be written as a sum of positive squares in 2 ways, for example, as 2050624 + 10699441 = 1432^2 + 3271^2 .

It is a cyclic number.

It is not a de Polignac number, because 12750065 - 2¹⁰ = 12749041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275002 + ... + 1275011.

It is an arithmetic number, because the mean of its divisors is an integer number (3825021).

Almost surely, 2^12750065 is an apocalyptic number.

It is an amenable number.

12750065 is a deficient number, since it is larger than the sum of its proper divisors (2550019).

12750065 is an equidigital number, since it uses as much as digits as its factorization.

12750065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550018.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 12750065 is about 3570.7233160804. The cubic root of 12750065 is about 233.6168334123.

Adding to 12750065 its reverse (56005721), we get a palindrome (68755786).

The spelling of 12750065 in words is "twelve million, seven hundred fifty thousand, sixty-five".