87042587 has 4 divisors (see below), whose sum is σ = 87068256. Its totient is φ = 87016920.

The previous prime is 87042583. The next prime is 87042617. The reversal of 87042587 is 78524078.

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 87042587 - 2² = 87042583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87042583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6803 + ... + 14844.

It is an arithmetic number, because the mean of its divisors is an integer number (21767064).

Almost surely, 2^87042587 is an apocalyptic number.

87042587 is a deficient number, since it is larger than the sum of its proper divisors (25669).

87042587 is a wasteful number, since it uses less digits than its factorization.

87042587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25668.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 87042587 is about 9329.6616766097. The cubic root of 87042587 is about 443.1770511512.

The spelling of 87042587 in words is "eighty-seven million, forty-two thousand, five hundred eighty-seven".