258415 has 4 divisors (see below), whose sum is σ = 310104. Its totient is φ = 206728.

The previous prime is 258413. The next prime is 258421. The reversal of 258415 is 514852.

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

It is a cyclic number.

It is not a de Polignac number, because 258415 - 2¹ = 258413 is a prime.

It is a Duffinian number.

258415 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 258415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258413) 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, 25837 + ... + 25846.

It is an arithmetic number, because the mean of its divisors is an integer number (77526).

2²⁵⁸⁴¹⁵ is an apocalyptic number.

258415 is a deficient number, since it is larger than the sum of its proper divisors (51689).

258415 is an equidigital number, since it uses as much as digits as its factorization.

258415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51688.

The product of its digits is 1600, while the sum is 25.

The square root of 258415 is about 508.3453550491. The cubic root of 258415 is about 63.6950827835.

The spelling of 258415 in words is "two hundred fifty-eight thousand, four hundred fifteen".