64587 has 4 divisors (see below), whose sum is σ = 86120. Its totient is φ = 43056.

The previous prime is 64579. The next prime is 64591. The reversal of 64587 is 78546.

It is a happy number.

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

It is not a de Polignac number, because 64587 - 2³ = 64579 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64587.

It is not an unprimeable number, because it can be changed into a prime (64567) 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, 10762 + ... + 10767.

It is an arithmetic number, because the mean of its divisors is an integer number (21530).

2⁶⁴⁵⁸⁷ is an apocalyptic number.

64587 is a deficient number, since it is larger than the sum of its proper divisors (21533).

64587 is a wasteful number, since it uses less digits than its factorization.

64587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21532.

The product of its digits is 6720, while the sum is 30.

The square root of 64587 is about 254.1397253481. The cubic root of 64587 is about 40.1219196789.

The spelling of 64587 in words is "sixty-four thousand, five hundred eighty-seven".