258507861 has 8 divisors (see below), whose sum is σ = 344805120. Its totient is φ = 172274592.

The previous prime is 258507859. The next prime is 258507869. The reversal of 258507861 is 168705852.

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

It is not a de Polignac number, because 258507861 - 2¹ = 258507859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258507869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5605 + ... + 23418.

It is an arithmetic number, because the mean of its divisors is an integer number (43100640).

Almost surely, 2^258507861 is an apocalyptic number.

It is an amenable number.

258507861 is a deficient number, since it is larger than the sum of its proper divisors (86297259).

258507861 is a wasteful number, since it uses less digits than its factorization.

258507861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31995.

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 258507861 is about 16078.1796544261. The cubic root of 258507861 is about 637.0271144379.

The spelling of 258507861 in words is "two hundred fifty-eight million, five hundred seven thousand, eight hundred sixty-one".