258481 has 4 divisors (see below), whose sum is σ = 263412. Its totient is φ = 253552.

The previous prime is 258469. The next prime is 258487. The reversal of 258481 is 184852.

258481 = 359² + 360².

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 128881 + 129600 = 359^2 + 360^2 .

It is not a de Polignac number, because 258481 - 2⁵ = 258449 is a prime.

It is a super-2 number, since 2×258481² = 133624854722, which contains 22 as substring.

It is a Duffinian number.

258481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (258487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2386 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (65853).

2²⁵⁸⁴⁸¹ is an apocalyptic number.

258481 is the 360-th centered square number.

It is an amenable number.

258481 is a deficient number, since it is larger than the sum of its proper divisors (4931).

258481 is an equidigital number, since it uses as much as digits as its factorization.

258481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4930.

The product of its digits is 2560, while the sum is 28.

The square root of 258481 is about 508.4102674022. The cubic root of 258481 is about 63.7005049631.

The spelling of 258481 in words is "two hundred fifty-eight thousand, four hundred eighty-one".