• 258493² = 66818631049 is an anagram of the next square 258494² = 66819148036.

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258493 has 4 divisors (see below), whose sum is σ = 262108. Its totient is φ = 254880.

The previous prime is 258491. The next prime is 258499. The reversal of 258493 is 394852.

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 127449 + 131044 = 357^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 258493 - 2¹ = 258491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1698 + ... + 1843.

It is an arithmetic number, because the mean of its divisors is an integer number (65527).

2²⁵⁸⁴⁹³ is an apocalyptic number.

It is an amenable number.

258493 is a deficient number, since it is larger than the sum of its proper divisors (3615).

258493 is an equidigital number, since it uses as much as digits as its factorization.

258493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614.

The product of its digits is 8640, while the sum is 31.

The square root of 258493 is about 508.4220687578. The cubic root of 258493 is about 63.7014907148.

It can be divided in two parts, 25849 and 3, that added together give a palindrome (25852).

The spelling of 258493 in words is "two hundred fifty-eight thousand, four hundred ninety-three".