258217 has 4 divisors (see below), whose sum is σ = 260100. Its totient is φ = 256336.

The previous prime is 258211. The next prime is 258233. The reversal of 258217 is 712852.

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 68121 + 190096 = 261^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 258217 - 2¹¹ = 256169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 258191 and 258200.

It is not an unprimeable number, because it can be changed into a prime (258211) 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, 718 + ... + 1015.

It is an arithmetic number, because the mean of its divisors is an integer number (65025).

2²⁵⁸²¹⁷ is an apocalyptic number.

It is an amenable number.

258217 is a deficient number, since it is larger than the sum of its proper divisors (1883).

258217 is a wasteful number, since it uses less digits than its factorization.

258217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882.

The product of its digits is 1120, while the sum is 25.

The square root of 258217 is about 508.1505682374. The cubic root of 258217 is about 63.6788107033.

The spelling of 258217 in words is "two hundred fifty-eight thousand, two hundred seventeen".