258942642 has 32 divisors (see below), whose sum is σ = 592374912. Its totient is φ = 73920384.

The previous prime is 258942641. The next prime is 258942661. The reversal of 258942642 is 246249852.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 258942594 and 258942603.

It is not an unprimeable number, because it can be changed into a prime (258942641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 71868 + ... + 75384.

It is an arithmetic number, because the mean of its divisors is an integer number (18511716).

Almost surely, 2^258942642 is an apocalyptic number.

258942642 is an abundant number, since it is smaller than the sum of its proper divisors (333432270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258942642 is a wasteful number, since it uses less digits than its factorization.

258942642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282.

The product of its digits is 276480, while the sum is 42.

The square root of 258942642 is about 16091.6948144066. The cubic root of 258942642 is about 637.3840502693.

The spelling of 258942642 in words is "two hundred fifty-eight million, nine hundred forty-two thousand, six hundred forty-two".