2775205 has 4 divisors (see below), whose sum is σ = 3330252. Its totient is φ = 2220160.

The previous prime is 2775193. The next prime is 2775221. The reversal of 2775205 is 5025772.

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 2208196 + 567009 = 1486^2 + 753^2 .

It is not a de Polignac number, because 2775205 - 2⁵ = 2775173 is a prime.

It is a Duffinian number.

2775205 is a lucky 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, 277516 + ... + 277525.

It is an arithmetic number, because the mean of its divisors is an integer number (832563).

2^2775205 is an apocalyptic number.

It is an amenable number.

2775205 is a deficient number, since it is larger than the sum of its proper divisors (555047).

2775205 is an equidigital number, since it uses as much as digits as its factorization.

2775205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555046.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 2775205 is about 1665.8946545325. The cubic root of 2775205 is about 140.5286981815.

The spelling of 2775205 in words is "two million, seven hundred seventy-five thousand, two hundred five".