2740205 has 8 divisors (see below), whose sum is σ = 3541272. Its totient is φ = 2023488.

The previous prime is 2740189. The next prime is 2740207. The reversal of 2740205 is 5020472.

It can be written as a sum of positive squares in 4 ways, for example, as 4489 + 2735716 = 67^2 + 1654^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2740205 - 2⁴ = 2740189 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 (2740207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21014 + ... + 21143.

It is an arithmetic number, because the mean of its divisors is an integer number (442659).

2^2740205 is an apocalyptic number.

It is an amenable number.

2740205 is a deficient number, since it is larger than the sum of its proper divisors (801067).

2740205 is a wasteful number, since it uses less digits than its factorization.

2740205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42175.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 2740205 is about 1655.3564570811. The cubic root of 2740205 is about 139.9354294071.

Adding to 2740205 its reverse (5020472), we get a palindrome (7760677).

The spelling of 2740205 in words is "two million, seven hundred forty thousand, two hundred five".