275205 has 16 divisors (see below), whose sum is σ = 503424. Its totient is φ = 125760.

The previous prime is 275201. The next prime is 275207. The reversal of 275205 is 502572.

It is not a de Polignac number, because 275205 - 2² = 275201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (31464).

2²⁷⁵²⁰⁵ is an apocalyptic number.

It is an amenable number.

275205 is a deficient number, since it is larger than the sum of its proper divisors (228219).

275205 is a wasteful number, since it uses less digits than its factorization.

275205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 275205 is about 524.5998475028. The cubic root of 275205 is about 65.0457271924.

Adding to 275205 its reverse (502572), we get a palindrome (777777).

The spelling of 275205 in words is "two hundred seventy-five thousand, two hundred five".