258728271 has 4 divisors (see below), whose sum is σ = 344971032. Its totient is φ = 172485512.

The previous prime is 258728243. The next prime is 258728293. The reversal of 258728271 is 172827852.

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 258728271 - 2⁶ = 258728207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258728231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43121376 + ... + 43121381.

It is an arithmetic number, because the mean of its divisors is an integer number (86242758).

Almost surely, 2^258728271 is an apocalyptic number.

258728271 is a deficient number, since it is larger than the sum of its proper divisors (86242761).

258728271 is an equidigital number, since it uses as much as digits as its factorization.

258728271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86242760.

The product of its digits is 125440, while the sum is 42.

The square root of 258728271 is about 16085.0325147324. The cubic root of 258728271 is about 637.2081112037.

It can be divided in two parts, 25872 and 8271, that added together give a palindrome (34143).

The spelling of 258728271 in words is "two hundred fifty-eight million, seven hundred twenty-eight thousand, two hundred seventy-one".