386257 has 4 divisors (see below), whose sum is σ = 408996. Its totient is φ = 363520.

The previous prime is 386249. The next prime is 386263. The reversal of 386257 is 752683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 229441 + 156816 = 479^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 386257 - 2³ = 386249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386227) 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, 11344 + ... + 11377.

It is an arithmetic number, because the mean of its divisors is an integer number (102249).

386257 is a Friedman number, since it can be written as 6+5^8-3^7*2, using all its digits and the basic arithmetic operations.

2³⁸⁶²⁵⁷ is an apocalyptic number.

It is an amenable number.

386257 is a deficient number, since it is larger than the sum of its proper divisors (22739).

386257 is a wasteful number, since it uses less digits than its factorization.

386257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22738.

The product of its digits is 10080, while the sum is 31.

The square root of 386257 is about 621.4957763332. The cubic root of 386257 is about 72.8269498298.

The spelling of 386257 in words is "three hundred eighty-six thousand, two hundred fifty-seven".