195857 has 8 divisors (see below), whose sum is σ = 213192. Its totient is φ = 179200.

The previous prime is 195817. The next prime is 195863. The reversal of 195857 is 758591.

It can be written as a sum of positive squares in 4 ways, for example, as 22801 + 173056 = 151^2 + 416^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195857 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195857.

It is not an unprimeable number, because it can be changed into a prime (195817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557 + ... + 837.

It is an arithmetic number, because the mean of its divisors is an integer number (26649).

2¹⁹⁵⁸⁵⁷ is an apocalyptic number.

195857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

195857 is a deficient number, since it is larger than the sum of its proper divisors (17335).

195857 is a wasteful number, since it uses less digits than its factorization.

195857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its digits is 12600, while the sum is 35.

The square root of 195857 is about 442.5573409175. The cubic root of 195857 is about 58.0737270898.

The spelling of 195857 in words is "one hundred ninety-five thousand, eight hundred fifty-seven".