2520505 has 16 divisors (see below), whose sum is σ = 3450384. Its totient is φ = 1751040.

The previous prime is 2520503. The next prime is 2520577. The reversal of 2520505 is 5050252.

It can be written as a sum of positive squares in 8 ways, for example, as 11449 + 2509056 = 107^2 + 1584^2 .

It is not a de Polignac number, because 2520505 - 2¹ = 2520503 is a prime.

It is a Duffinian number.

2520505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2520503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36 + ... + 2245.

It is an arithmetic number, because the mean of its divisors is an integer number (215649).

2^2520505 is an apocalyptic number.

It is an amenable number.

2520505 is a deficient number, since it is larger than the sum of its proper divisors (929879).

2520505 is a wasteful number, since it uses less digits than its factorization.

2520505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 2520505 is about 1587.6098387198. The cubic root of 2520505 is about 136.0909318350.

Adding to 2520505 its reverse (5050252), we get a palindrome (7570757).

It can be divided in two parts, 2520 and 505, that added together give a square (3025 = 55²).

The spelling of 2520505 in words is "two million, five hundred twenty thousand, five hundred five".