12804881 has 4 divisors (see below), whose sum is σ = 12931764. Its totient is φ = 12678000.

The previous prime is 12804877. The next prime is 12804907. The reversal of 12804881 is 18840821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18840821 = 3739 ⋅5039.

It can be written as a sum of positive squares in 2 ways, for example, as 8904256 + 3900625 = 2984^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 12804881 - 2² = 12804877 is a prime.

It is a super-2 number, since 2×12804881² = 327929954848322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12804811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63290 + ... + 63491.

It is an arithmetic number, because the mean of its divisors is an integer number (3232941).

Almost surely, 2^12804881 is an apocalyptic number.

It is an amenable number.

12804881 is a deficient number, since it is larger than the sum of its proper divisors (126883).

12804881 is a wasteful number, since it uses less digits than its factorization.

12804881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126882.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 12804881 is about 3578.3908394696. The cubic root of 12804881 is about 233.9511488838.

The spelling of 12804881 in words is "twelve million, eight hundred four thousand, eight hundred eighty-one".