655205 has 4 divisors (see below), whose sum is σ = 786252. Its totient is φ = 524160.

The previous prime is 655181. The next prime is 655211. The reversal of 655205 is 502556.

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 91204 + 564001 = 302^2 + 751^2 .

It is not a de Polignac number, because 655205 - 2¹² = 651109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65516 + ... + 65525.

It is an arithmetic number, because the mean of its divisors is an integer number (196563).

2⁶⁵⁵²⁰⁵ is an apocalyptic number.

It is an amenable number.

655205 is a deficient number, since it is larger than the sum of its proper divisors (131047).

655205 is a wasteful number, since it uses less digits than its factorization.

655205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131046.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 655205 is about 809.4473423268. The cubic root of 655205 is about 86.8545152951.

The spelling of 655205 in words is "six hundred fifty-five thousand, two hundred five".