258942021 has 32 divisors (see below), whose sum is σ = 383755008. Its totient is φ = 154275840.

The previous prime is 258941999. The next prime is 258942031. The reversal of 258942021 is 120249852.

It is not a de Polignac number, because 258942021 - 2⁹ = 258941509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258942031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448485 + ... + 449061.

It is an arithmetic number, because the mean of its divisors is an integer number (11992344).

Almost surely, 2^258942021 is an apocalyptic number.

It is an amenable number.

258942021 is a deficient number, since it is larger than the sum of its proper divisors (124812987).

258942021 is a wasteful number, since it uses less digits than its factorization.

258942021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 258942021 is about 16091.6755187271. The cubic root of 258942021 is about 637.3835407410.

The spelling of 258942021 in words is "two hundred fifty-eight million, nine hundred forty-two thousand, twenty-one".