258694421 has 4 divisors (see below), whose sum is σ = 259834272. Its totient is φ = 257554572.

The previous prime is 258694391. The next prime is 258694433. The reversal of 258694421 is 124496852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 258694421 - 2⁶ = 258694357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258694451) 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 3 ways as a sum of consecutive naturals, for example, 569585 + ... + 570038.

It is an arithmetic number, because the mean of its divisors is an integer number (64958568).

Almost surely, 2^258694421 is an apocalyptic number.

It is an amenable number.

258694421 is a deficient number, since it is larger than the sum of its proper divisors (1139851).

258694421 is a wasteful number, since it uses less digits than its factorization.

258694421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139850.

The product of its digits is 138240, while the sum is 41.

The square root of 258694421 is about 16083.9802598735. The cubic root of 258694421 is about 637.1803208696.

The spelling of 258694421 in words is "two hundred fifty-eight million, six hundred ninety-four thousand, four hundred twenty-one".