258945 has 16 divisors (see below), whose sum is σ = 422592. Its totient is φ = 135360.

The previous prime is 258919. The next prime is 258949. The reversal of 258945 is 549852.

It is not a de Polignac number, because 258945 - 2¹⁰ = 257921 is a prime.

It is an Ulam number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (26412).

2²⁵⁸⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

258945 is a deficient number, since it is larger than the sum of its proper divisors (163647).

258945 is a wasteful number, since it uses less digits than its factorization.

258945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its digits is 14400, while the sum is 33.

The square root of 258945 is about 508.8663871784. The cubic root of 258945 is about 63.7385984993.

The spelling of 258945 in words is "two hundred fifty-eight thousand, nine hundred forty-five".