12764881 has 4 divisors (see below), whose sum is σ = 12882100. Its totient is φ = 12647664.

The previous prime is 12764879. The next prime is 12764887. The reversal of 12764881 is 18846721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6051600 + 6713281 = 2460^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 12764881 - 2¹ = 12764879 is a prime.

It is a super-2 number, since 2×12764881² = 325884373888322, which contains 22 as substring.

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 12764881.

It is not an unprimeable number, because it can be changed into a prime (12764887) 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, 58446 + ... + 58663.

It is an arithmetic number, because the mean of its divisors is an integer number (3220525).

Almost surely, 2^12764881 is an apocalyptic number.

It is an amenable number.

12764881 is a deficient number, since it is larger than the sum of its proper divisors (117219).

12764881 is a wasteful number, since it uses less digits than its factorization.

12764881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117218.

The product of its digits is 21504, while the sum is 37.

The square root of 12764881 is about 3572.7973634115. The cubic root of 12764881 is about 233.7072885634.

The spelling of 12764881 in words is "twelve million, seven hundred sixty-four thousand, eight hundred eighty-one".