12810813 has 8 divisors (see below), whose sum is σ = 17112000. Its totient is φ = 8525088.

The previous prime is 12810799. The next prime is 12810821. The reversal of 12810813 is 31801821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12810813 - 2⁸ = 12810557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12810013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768 + ... + 5361.

It is an arithmetic number, because the mean of its divisors is an integer number (2139000).

Almost surely, 2^12810813 is an apocalyptic number.

It is an amenable number.

12810813 is a deficient number, since it is larger than the sum of its proper divisors (4301187).

12810813 is an equidigital number, since it uses as much as digits as its factorization.

12810813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731.

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

The square root of 12810813 is about 3579.2196076799. The cubic root of 12810813 is about 233.9872701089.

The spelling of 12810813 in words is "twelve million, eight hundred ten thousand, eight hundred thirteen".