258542117 has 2 divisors, whose sum is σ = 258542118. Its totient is φ = 258542116.

The previous prime is 258542111. The next prime is 258542173. The reversal of 258542117 is 711245852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237437281 + 21104836 = 15409^2 + 4594^2 .

It is a cyclic number.

It is not a de Polignac number, because 258542117 - 2⁸ = 258541861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258542111) 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 as a sum of consecutive naturals, namely, 129271058 + 129271059.

It is an arithmetic number, because the mean of its divisors is an integer number (129271059).

Almost surely, 2^258542117 is an apocalyptic number.

It is an amenable number.

258542117 is a deficient number, since it is larger than the sum of its proper divisors (1).

258542117 is an equidigital number, since it uses as much as digits as its factorization.

258542117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 35.

The square root of 258542117 is about 16079.2449138633. The cubic root of 258542117 is about 637.0552516054.

Adding to 258542117 its reverse (711245852), we get a palindrome (969787969).

The spelling of 258542117 in words is "two hundred fifty-eight million, five hundred forty-two thousand, one hundred seventeen".