12810761 has 4 divisors (see below), whose sum is σ = 12877332. Its totient is φ = 12744192.

The previous prime is 12810757. The next prime is 12810767. The reversal of 12810761 is 16701821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16701821 = 373 ⋅44777.

It can be written as a sum of positive squares in 2 ways, for example, as 8231161 + 4579600 = 2869^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 12810761 - 2² = 12810757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12810761.

It is not an unprimeable number, because it can be changed into a prime (12810767) by changing a digit.

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, 32996 + ... + 33381.

It is an arithmetic number, because the mean of its divisors is an integer number (3219333).

Almost surely, 2^12810761 is an apocalyptic number.

It is an amenable number.

12810761 is a deficient number, since it is larger than the sum of its proper divisors (66571).

12810761 is an equidigital number, since it uses as much as digits as its factorization.

12810761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66570.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 12810761 is about 3579.2123435192. The cubic root of 12810761 is about 233.9869535181.

The spelling of 12810761 in words is "twelve million, eight hundred ten thousand, seven hundred sixty-one".