258128542 has 8 divisors (see below), whose sum is σ = 442506096. Its totient is φ = 110626512.

The previous prime is 258128491. The next prime is 258128639. The reversal of 258128542 is 245821852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9218863 + ... + 9218890.

It is an arithmetic number, because the mean of its divisors is an integer number (55313262).

Almost surely, 2^258128542 is an apocalyptic number.

258128542 is a deficient number, since it is larger than the sum of its proper divisors (184377554).

258128542 is a wasteful number, since it uses less digits than its factorization.

258128542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18437762.

The product of its digits is 51200, while the sum is 37.

The square root of 258128542 is about 16066.3792436255. The cubic root of 258128542 is about 636.7153833991.

The spelling of 258128542 in words is "two hundred fifty-eight million, one hundred twenty-eight thousand, five hundred forty-two".