2520909 has 16 divisors (see below), whose sum is σ = 3788800. Its totient is φ = 1656288.

The previous prime is 2520907. The next prime is 2520929. The reversal of 2520909 is 9090252.

It is not a de Polignac number, because 2520909 - 2¹ = 2520907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

2520909 is a modest number, since divided by 909 gives 252 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520907) 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, 1332 + ... + 2610.

It is an arithmetic number, because the mean of its divisors is an integer number (236800).

2^2520909 is an apocalyptic number.

It is an amenable number.

2520909 is a deficient number, since it is larger than the sum of its proper divisors (1267891).

2520909 is a wasteful number, since it uses less digits than its factorization.

2520909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 2520909 is about 1587.7370689129. The cubic root of 2520909 is about 136.0982025736.

The spelling of 2520909 in words is "two million, five hundred twenty thousand, nine hundred nine".