12798857 has 4 divisors (see below), whose sum is σ = 12848916. Its totient is φ = 12748800.

The previous prime is 12798853. The next prime is 12798881. The reversal of 12798857 is 75889721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75889721 = 8467 ⋅8963.

It can be written as a sum of positive squares in 2 ways, for example, as 9616201 + 3182656 = 3101^2 + 1784^2 .

It is a cyclic number.

It is not a de Polignac number, because 12798857 - 2² = 12798853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12798853) 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 3 ways as a sum of consecutive naturals, for example, 24644 + ... + 25157.

It is an arithmetic number, because the mean of its divisors is an integer number (3212229).

Almost surely, 2^12798857 is an apocalyptic number.

It is an amenable number.

12798857 is a deficient number, since it is larger than the sum of its proper divisors (50059).

12798857 is an equidigital number, since it uses as much as digits as its factorization.

12798857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50058.

The product of its digits is 282240, while the sum is 47.

The square root of 12798857 is about 3577.5490213273. The cubic root of 12798857 is about 233.9144560325.

The spelling of 12798857 in words is "twelve million, seven hundred ninety-eight thousand, eight hundred fifty-seven".