258465 has 8 divisors (see below), whose sum is σ = 413568. Its totient is φ = 137840.

The previous prime is 258449. The next prime is 258469. The reversal of 258465 is 564852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 258465 - 2⁴ = 258449 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258465.

It is not an unprimeable number, because it can be changed into a prime (258469) 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, 8601 + ... + 8630.

It is an arithmetic number, because the mean of its divisors is an integer number (51696).

2²⁵⁸⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

258465 is a deficient number, since it is larger than the sum of its proper divisors (155103).

258465 is a wasteful number, since it uses less digits than its factorization.

258465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17239.

The product of its digits is 9600, while the sum is 30.

The square root of 258465 is about 508.3945318353. The cubic root of 258465 is about 63.6991905801.

Subtracting from 258465 its product of digits (9600), we obtain a triangular number (248865 = T₇₀₅).

The spelling of 258465 in words is "two hundred fifty-eight thousand, four hundred sixty-five".