257855 has 8 divisors (see below), whose sum is σ = 333312. Its totient is φ = 190368.

The previous prime is 257837. The next prime is 257857. The reversal of 257855 is 558752.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 257855 - 2⁶ = 257791 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 (257857) 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, 1919 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (41664).

2²⁵⁷⁸⁵⁵ is an apocalyptic number.

257855 is a deficient number, since it is larger than the sum of its proper divisors (75457).

257855 is a wasteful number, since it uses less digits than its factorization.

257855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985.

The product of its digits is 14000, while the sum is 32.

The square root of 257855 is about 507.7942496720. The cubic root of 257855 is about 63.6490392190.

The spelling of 257855 in words is "two hundred fifty-seven thousand, eight hundred fifty-five".