258086042 has 4 divisors (see below), whose sum is σ = 387129066. Its totient is φ = 129043020.

The previous prime is 258086039. The next prime is 258086047. The reversal of 258086042 is 240680852.

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

It can be written as a sum of positive squares in only one way, i.e., 257955721 + 130321 = 16061^2 + 361^2 .

It is a junction number, because it is equal to n+sod(n) for n = 258085993 and 258086011.

It is not an unprimeable number, because it can be changed into a prime (258086047) 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, 64521509 + ... + 64521512.

Almost surely, 2^258086042 is an apocalyptic number.

258086042 is a deficient number, since it is larger than the sum of its proper divisors (129043024).

258086042 is a wasteful number, since it uses less digits than its factorization.

258086042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129043023.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 258086042 is about 16065.0565514100. The cubic root of 258086042 is about 636.6804371292.

The spelling of 258086042 in words is "two hundred fifty-eight million, eighty-six thousand, forty-two".