258112861 has 4 divisors (see below), whose sum is σ = 263604672. Its totient is φ = 252621052.

The previous prime is 258112859. The next prime is 258112909. The reversal of 258112861 is 168211852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 258112861 - 2¹ = 258112859 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 (258112801) 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, 2745835 + ... + 2745928.

It is an arithmetic number, because the mean of its divisors is an integer number (65901168).

Almost surely, 2^258112861 is an apocalyptic number.

It is an amenable number.

258112861 is a deficient number, since it is larger than the sum of its proper divisors (5491811).

258112861 is an equidigital number, since it uses as much as digits as its factorization.

258112861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491810.

The product of its digits is 7680, while the sum is 34.

The square root of 258112861 is about 16065.8912295584. The cubic root of 258112861 is about 636.7024899055.

The spelling of 258112861 in words is "two hundred fifty-eight million, one hundred twelve thousand, eight hundred sixty-one".