10287857 has 4 divisors (see below), whose sum is σ = 10301940. Its totient is φ = 10273776.

The previous prime is 10287853. The next prime is 10287869. The reversal of 10287857 is 75878201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75878201 = 7 ⋅10839743.

It can be written as a sum of positive squares in 2 ways, for example, as 295936 + 9991921 = 544^2 + 3161^2 .

It is a cyclic number.

It is not a de Polignac number, because 10287857 - 2² = 10287853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10287857.

It is not an unprimeable number, because it can be changed into a prime (10287853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5882 + ... + 7427.

It is an arithmetic number, because the mean of its divisors is an integer number (2575485).

Almost surely, 2^10287857 is an apocalyptic number.

It is an amenable number.

10287857 is a deficient number, since it is larger than the sum of its proper divisors (14083).

10287857 is an equidigital number, since it uses as much as digits as its factorization.

10287857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14082.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 10287857 is about 3207.4689398340. The cubic root of 10287857 is about 217.4911750504.

The spelling of 10287857 in words is "ten million, two hundred eighty-seven thousand, eight hundred fifty-seven".