987205 has 4 divisors (see below), whose sum is σ = 1184652. Its totient is φ = 789760.

The previous prime is 987199. The next prime is 987209. The reversal of 987205 is 502789.

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

It can be written as a sum of positive squares in 2 ways, for example, as 388129 + 599076 = 623^2 + 774^2 .

It is not a de Polignac number, because 987205 - 2⁹ = 986693 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987209) 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, 98716 + ... + 98725.

It is an arithmetic number, because the mean of its divisors is an integer number (296163).

2⁹⁸⁷²⁰⁵ is an apocalyptic number.

It is an amenable number.

987205 is a deficient number, since it is larger than the sum of its proper divisors (197447).

987205 is a wasteful number, since it uses less digits than its factorization.

987205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197446.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 987205 is about 993.5819040220. The cubic root of 987205 is about 99.5716679359.

Subtracting from 987205 its reverse (502789), we obtain a square (484416 = 696²).

The spelling of 987205 in words is "nine hundred eighty-seven thousand, two hundred five".