101857 has 4 divisors (see below), whose sum is σ = 116416. Its totient is φ = 87300.

The previous prime is 101839. The next prime is 101863. The reversal of 101857 is 758101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101857 - 2¹¹ = 99809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101807) 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, 7269 + ... + 7282.

It is an arithmetic number, because the mean of its divisors is an integer number (29104).

2¹⁰¹⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

101857 is a deficient number, since it is larger than the sum of its proper divisors (14559).

101857 is an equidigital number, since it uses as much as digits as its factorization.

101857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14558.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 101857 is about 319.1504347483. The cubic root of 101857 is about 46.7014423330.

Adding to 101857 its reverse (758101), we get a palindrome (859958).

The spelling of 101857 in words is "one hundred one thousand, eight hundred fifty-seven".