12798515 has 4 divisors (see below), whose sum is σ = 15358224. Its totient is φ = 10238808.

The previous prime is 12798509. The next prime is 12798547. The reversal of 12798515 is 51589721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12798515 - 2⁸ = 12798259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1279847 + ... + 1279856.

It is an arithmetic number, because the mean of its divisors is an integer number (3839556).

Almost surely, 2^12798515 is an apocalyptic number.

12798515 is a deficient number, since it is larger than the sum of its proper divisors (2559709).

12798515 is an equidigital number, since it uses as much as digits as its factorization.

12798515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559708.

The product of its digits is 25200, while the sum is 38.

The square root of 12798515 is about 3577.5012229208. The cubic root of 12798515 is about 233.9123725273.

The spelling of 12798515 in words is "twelve million, seven hundred ninety-eight thousand, five hundred fifteen".