12764861 has 4 divisors (see below), whose sum is σ = 12789792. Its totient is φ = 12739932.

The previous prime is 12764849. The next prime is 12764879. The reversal of 12764861 is 16846721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12764861 - 2⁶ = 12764797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12764831) by changing a digit.

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, 11681 + ... + 12726.

It is an arithmetic number, because the mean of its divisors is an integer number (3197448).

Almost surely, 2^12764861 is an apocalyptic number.

It is an amenable number.

12764861 is a deficient number, since it is larger than the sum of its proper divisors (24931).

12764861 is an equidigital number, since it uses as much as digits as its factorization.

12764861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24930.

The product of its digits is 16128, while the sum is 35.

The square root of 12764861 is about 3572.7945644831. The cubic root of 12764861 is about 233.7071665059.

The spelling of 12764861 in words is "twelve million, seven hundred sixty-four thousand, eight hundred sixty-one".