2730005 has 4 divisors (see below), whose sum is σ = 3276012. Its totient is φ = 2184000.

The previous prime is 2730001. The next prime is 2730011. The reversal of 2730005 is 5000372.

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 1943236 + 786769 = 1394^2 + 887^2 .

It is not a de Polignac number, because 2730005 - 2² = 2730001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2730001) 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, 272996 + ... + 273005.

It is an arithmetic number, because the mean of its divisors is an integer number (819003).

2^2730005 is an apocalyptic number.

It is an amenable number.

2730005 is a deficient number, since it is larger than the sum of its proper divisors (546007).

2730005 is an equidigital number, since it uses as much as digits as its factorization.

2730005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546006.

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 2730005 is about 1652.2726772540. The cubic root of 2730005 is about 139.7615840108.

Adding to 2730005 its reverse (5000372), we get a palindrome (7730377).

The spelling of 2730005 in words is "two million, seven hundred thirty thousand, five".