258987 has 8 divisors (see below), whose sum is σ = 348480. Its totient is φ = 171080.

The previous prime is 258983. The next prime is 258991. The reversal of 258987 is 789852.

It is an interprime number because it is at equal distance from previous prime (258983) and next prime (258991).

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 258987 - 2² = 258983 is a prime.

It is a d-powerful number, because it can be written as 2² + 5⁷ + 9⁵ + 8² + 8⁴ + 7⁶ .

It is an alternating number because its digits alternate between even and odd.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258987.

It is not an unprimeable number, because it can be changed into a prime (258983) 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, 64 + ... + 722.

It is an arithmetic number, because the mean of its divisors is an integer number (43560).

2²⁵⁸⁹⁸⁷ is an apocalyptic number.

258987 is a deficient number, since it is larger than the sum of its proper divisors (89493).

258987 is a wasteful number, since it uses less digits than its factorization.

258987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its digits is 40320, while the sum is 39.

The square root of 258987 is about 508.9076537055. The cubic root of 258987 is about 63.7420443744.

The spelling of 258987 in words is "two hundred fifty-eight thousand, nine hundred eighty-seven".