258042987 has 12 divisors (see below), whose sum is σ = 372891480. Its totient is φ = 171953568.

The previous prime is 258042979. The next prime is 258042991. The reversal of 258042987 is 789240852.

It is not a de Polignac number, because 258042987 - 2³ = 258042979 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (258042907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22423 + ... + 31919.

It is an arithmetic number, because the mean of its divisors is an integer number (31074290).

Almost surely, 2^258042987 is an apocalyptic number.

258042987 is a deficient number, since it is larger than the sum of its proper divisors (114848493).

258042987 is a wasteful number, since it uses less digits than its factorization.

258042987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12522 (or 12519 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 258042987 is about 16063.7164753366. The cubic root of 258042987 is about 636.6450305900.

The spelling of 258042987 in words is "two hundred fifty-eight million, forty-two thousand, nine hundred eighty-seven".