57865 has 8 divisors (see below), whose sum is σ = 70848. Its totient is φ = 45360.

The previous prime is 57859. The next prime is 57881. The reversal of 57865 is 56875.

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

It is not a de Polignac number, because 57865 - 2⁷ = 57737 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274 + ... + 436.

It is an arithmetic number, because the mean of its divisors is an integer number (8856).

2⁵⁷⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

57865 is a deficient number, since it is larger than the sum of its proper divisors (12983).

57865 is a wasteful number, since it uses less digits than its factorization.

57865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239.

The product of its digits is 8400, while the sum is 31.

The square root of 57865 is about 240.5514497982. The cubic root of 57865 is about 38.6787104113.

Subtracting from 57865 its reverse (56875), we obtain a triangular number (990 = T₄₄).

The spelling of 57865 in words is "fifty-seven thousand, eight hundred sixty-five".