2520005 has 4 divisors (see below), whose sum is σ = 3024012. Its totient is φ = 2016000.

The previous prime is 2519981. The next prime is 2520017. The reversal of 2520005 is 5000252.

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 543169 + 1976836 = 737^2 + 1406^2 .

It is not a de Polignac number, because 2520005 - 2⁶ = 2519941 is a prime.

It is a Duffinian 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, 251996 + ... + 252005.

It is an arithmetic number, because the mean of its divisors is an integer number (756003).

2^2520005 is an apocalyptic number.

It is an amenable number.

2520005 is a deficient number, since it is larger than the sum of its proper divisors (504007).

2520005 is an equidigital number, since it uses as much as digits as its factorization.

2520005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504006.

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 2520005 is about 1587.4523614899. The cubic root of 2520005 is about 136.0819323202.

Adding to 2520005 its reverse (5000252), we get a palindrome (7520257).

The spelling of 2520005 in words is "two million, five hundred twenty thousand, five".