258021491 has 8 divisors (see below), whose sum is σ = 317565024. Its totient is φ = 204148800.

The previous prime is 258021479. The next prime is 258021503. The reversal of 258021491 is 194120852.

258021491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (258021479) and next prime (258021503).

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

It is a cyclic number.

It is not a de Polignac number, because 258021491 - 2¹⁰ = 258020467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (258021791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417610 + ... + 1417791.

It is an arithmetic number, because the mean of its divisors is an integer number (39695628).

Almost surely, 2^258021491 is an apocalyptic number.

258021491 is a deficient number, since it is larger than the sum of its proper divisors (59543533).

258021491 is a wasteful number, since it uses less digits than its factorization.

258021491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835421.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 258021491 is about 16063.0473758873. The cubic root of 258021491 is about 636.6273517506.

The spelling of 258021491 in words is "two hundred fifty-eight million, twenty-one thousand, four hundred ninety-one".