10128857 has 4 divisors (see below), whose sum is σ = 10141236. Its totient is φ = 10116480.

The previous prime is 10128841. The next prime is 10128869. The reversal of 10128857 is 75882101.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3798601 + 6330256 = 1949^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 10128857 - 2⁴ = 10128841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10128817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4868 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (2535309).

Almost surely, 2^10128857 is an apocalyptic number.

It is an amenable number.

10128857 is a deficient number, since it is larger than the sum of its proper divisors (12379).

10128857 is an equidigital number, since it uses as much as digits as its factorization.

10128857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12378.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 10128857 is about 3182.5865267106. The cubic root of 10128857 is about 216.3649024616.

The spelling of 10128857 in words is "ten million, one hundred twenty-eight thousand, eight hundred fifty-seven".