42587 has 4 divisors (see below), whose sum is σ = 43776. Its totient is φ = 41400.

The previous prime is 42577. The next prime is 42589. The reversal of 42587 is 78524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42587 - 2⁴ = 42571 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42587.

It is not an unprimeable number, because it can be changed into a prime (42589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539 + ... + 612.

It is an arithmetic number, because the mean of its divisors is an integer number (10944).

2⁴²⁵⁸⁷ is an apocalyptic number.

42587 is a deficient number, since it is larger than the sum of its proper divisors (1189).

42587 is a wasteful number, since it uses less digits than its factorization.

42587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its digits is 2240, while the sum is 26.

The square root of 42587 is about 206.3661793996. The cubic root of 42587 is about 34.9214565256.

Subtracting 42587 from its reverse (78524), we obtain a cube (35937 = 33³).

It can be divided in two parts, 425 and 87, that added together give a 9-th power (512 = 2⁹).

The spelling of 42587 in words is "forty-two thousand, five hundred eighty-seven".