258145 has 8 divisors (see below), whose sum is σ = 328104. Its totient is φ = 194304.

The previous prime is 258143. The next prime is 258157. The reversal of 258145 is 541852.

258145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 97344 + 160801 = 312^2 + 401^2 .

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 258145 - 2¹ = 258143 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258143) 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, 1434 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (41013).

2²⁵⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

258145 is a deficient number, since it is larger than the sum of its proper divisors (69959).

258145 is a wasteful number, since it uses less digits than its factorization.

258145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059.

The product of its digits is 1600, while the sum is 25.

The square root of 258145 is about 508.0797181545. The cubic root of 258145 is about 63.6728915209.

Adding to 258145 its reverse (541852), we get a palindrome (799997).

The spelling of 258145 in words is "two hundred fifty-eight thousand, one hundred forty-five".