2520509 has 4 divisors (see below), whose sum is σ = 2524704. Its totient is φ = 2516316.

The previous prime is 2520503. The next prime is 2520577. The reversal of 2520509 is 9050252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2520509 - 2¹² = 2516413 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 (2520503) 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, 1007 + ... + 2460.

It is an arithmetic number, because the mean of its divisors is an integer number (631176).

2^2520509 is an apocalyptic number.

It is an amenable number.

2520509 is a deficient number, since it is larger than the sum of its proper divisors (4195).

2520509 is an equidigital number, since it uses as much as digits as its factorization.

2520509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2520509 is about 1587.6110984747. The cubic root of 2520509 is about 136.0910038263.

The spelling of 2520509 in words is "two million, five hundred twenty thousand, five hundred nine".