12813081 has 4 divisors (see below), whose sum is σ = 17084112. Its totient is φ = 8542052.

The previous prime is 12813037. The next prime is 12813083. The reversal of 12813081 is 18031821.

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 12813081 - 2¹⁰ = 12812057 is a prime.

It is a super-2 number, since 2×12813081² = 328350089425122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12813083) 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, 2135511 + ... + 2135516.

It is an arithmetic number, because the mean of its divisors is an integer number (4271028).

Almost surely, 2^12813081 is an apocalyptic number.

It is an amenable number.

12813081 is a deficient number, since it is larger than the sum of its proper divisors (4271031).

12813081 is an equidigital number, since it uses as much as digits as its factorization.

12813081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271030.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 12813081 is about 3579.5364224994. The cubic root of 12813081 is about 234.0010775025.

The spelling of 12813081 in words is "twelve million, eight hundred thirteen thousand, eighty-one".