12842815 has 4 divisors (see below), whose sum is σ = 15411384. Its totient is φ = 10274248.

The previous prime is 12842813. The next prime is 12842821. The reversal of 12842815 is 51824821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51824821 = 257 ⋅201653.

It is a cyclic number.

It is not a de Polignac number, because 12842815 - 2¹ = 12842813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12842813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284277 + ... + 1284286.

It is an arithmetic number, because the mean of its divisors is an integer number (3852846).

Almost surely, 2^12842815 is an apocalyptic number.

12842815 is a deficient number, since it is larger than the sum of its proper divisors (2568569).

12842815 is an equidigital number, since it uses as much as digits as its factorization.

12842815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568568.

The product of its digits is 5120, while the sum is 31.

The square root of 12842815 is about 3583.6873468538. The cubic root of 12842815 is about 234.1819450834.

The spelling of 12842815 in words is "twelve million, eight hundred forty-two thousand, eight hundred fifteen".