201587 has 4 divisors (see below), whose sum is σ = 202800. Its totient is φ = 200376.

The previous prime is 201581. The next prime is 201589. The reversal of 201587 is 785102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201587 is a prime.

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 201587.

It is not an unprimeable number, because it can be changed into a prime (201581) 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, 308 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (50700).

2²⁰¹⁵⁸⁷ is an apocalyptic number.

201587 is a deficient number, since it is larger than the sum of its proper divisors (1213).

201587 is a wasteful number, since it uses less digits than its factorization.

201587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 201587 is about 448.9844095289. The cubic root of 201587 is about 58.6346279667.

Adding to 201587 its reverse (785102), we get a palindrome (986689).

The spelling of 201587 in words is "two hundred one thousand, five hundred eighty-seven".