857853 has 6 divisors (see below), whose sum is σ = 1239134. Its totient is φ = 571896.

The previous prime is 857851. The next prime is 857867. The reversal of 857853 is 358758.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 842724 + 15129 = 918^2 + 123^2 .

It is not a de Polignac number, because 857853 - 2¹ = 857851 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 (857851) 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 5 ways as a sum of consecutive naturals, for example, 47650 + ... + 47667.

2⁸⁵⁷⁸⁵³ is an apocalyptic number.

It is an amenable number.

857853 is a deficient number, since it is larger than the sum of its proper divisors (381281).

857853 is a wasteful number, since it uses less digits than its factorization.

857853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95323 (or 95320 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 857853 is about 926.2035413450. The cubic root of 857853 is about 95.0176513831.

The spelling of 857853 in words is "eight hundred fifty-seven thousand, eight hundred fifty-three".