258257 has 4 divisors (see below), whose sum is σ = 260916. Its totient is φ = 255600.

The previous prime is 258253. The next prime is 258277. The reversal of 258257 is 752852.

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 192721 + 65536 = 439^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 258257 - 2² = 258253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258253) 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, 1178 + ... + 1379.

It is an arithmetic number, because the mean of its divisors is an integer number (65229).

2²⁵⁸²⁵⁷ is an apocalyptic number.

It is an amenable number.

258257 is a deficient number, since it is larger than the sum of its proper divisors (2659).

258257 is a wasteful number, since it uses less digits than its factorization.

258257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658.

The product of its digits is 5600, while the sum is 29.

The square root of 258257 is about 508.1899251264. The cubic root of 258257 is about 63.6820986626.

It can be divided in two parts, 258 and 257, that added together give a palindrome (515).

The spelling of 258257 in words is "two hundred fifty-eight thousand, two hundred fifty-seven".