12913815 has 8 divisors (see below), whose sum is σ = 20662128. Its totient is φ = 6887360.

The previous prime is 12913801. The next prime is 12913819. The reversal of 12913815 is 51831921.

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

It is not a de Polignac number, because 12913815 - 2⁵ = 12913783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12913819) 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 7 ways as a sum of consecutive naturals, for example, 430446 + ... + 430475.

It is an arithmetic number, because the mean of its divisors is an integer number (2582766).

Almost surely, 2^12913815 is an apocalyptic number.

12913815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12913815 is a deficient number, since it is larger than the sum of its proper divisors (7748313).

12913815 is an equidigital number, since it uses as much as digits as its factorization.

12913815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860929.

The product of its digits is 2160, while the sum is 30.

The square root of 12913815 is about 3593.5796916167. The cubic root of 12913815 is about 234.6127014212.

The spelling of 12913815 in words is "twelve million, nine hundred thirteen thousand, eight hundred fifteen".