258542091 has 8 divisors (see below), whose sum is σ = 383025360. Its totient is φ = 172361376.

The previous prime is 258542083. The next prime is 258542111. The reversal of 258542091 is 190245852.

258542091 is a `hidden beast` number, since 25 + 8 + 542 + 0 + 91 = 666.

It is not a de Polignac number, because 258542091 - 2³ = 258542083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (258542191) 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 7 ways as a sum of consecutive naturals, for example, 4787790 + ... + 4787843.

It is an arithmetic number, because the mean of its divisors is an integer number (47878170).

Almost surely, 2^258542091 is an apocalyptic number.

258542091 is a deficient number, since it is larger than the sum of its proper divisors (124483269).

258542091 is an equidigital number, since it uses as much as digits as its factorization.

258542091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9575642 (or 9575636 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 258542091 is about 16079.2441053676. The cubic root of 258542091 is about 637.0552302505.

The spelling of 258542091 in words is "two hundred fifty-eight million, five hundred forty-two thousand, ninety-one".