12684881 has 4 divisors (see below), whose sum is σ = 13838064. Its totient is φ = 11531700.

The previous prime is 12684869. The next prime is 12684911. The reversal of 12684881 is 18848621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18848621 = 11 ⋅1713511.

It is a cyclic number.

It is not a de Polignac number, because 12684881 - 2¹⁰ = 12683857 is a prime.

It is a super-2 number, since 2×12684881² = 321812411968322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12684181) 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, 576575 + ... + 576596.

It is an arithmetic number, because the mean of its divisors is an integer number (3459516).

Almost surely, 2^12684881 is an apocalyptic number.

12684881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12684881 is a deficient number, since it is larger than the sum of its proper divisors (1153183).

12684881 is a wasteful number, since it uses less digits than its factorization.

12684881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153182.

The product of its digits is 24576, while the sum is 38.

The square root of 12684881 is about 3561.5840576912. The cubic root of 12684881 is about 233.2180353269.

The spelling of 12684881 in words is "twelve million, six hundred eighty-four thousand, eight hundred eighty-one".