258455 has 4 divisors (see below), whose sum is σ = 310152. Its totient is φ = 206760.

The previous prime is 258449. The next prime is 258469. The reversal of 258455 is 554852.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-258455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258455.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25841 + ... + 25850.

It is an arithmetic number, because the mean of its divisors is an integer number (77538).

2²⁵⁸⁴⁵⁵ is an apocalyptic number.

258455 is a deficient number, since it is larger than the sum of its proper divisors (51697).

258455 is an equidigital number, since it uses as much as digits as its factorization.

258455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51696.

The product of its digits is 8000, while the sum is 29.

The square root of 258455 is about 508.3846968586. The cubic root of 258455 is about 63.6983690632.

The spelling of 258455 in words is "two hundred fifty-eight thousand, four hundred fifty-five".