2064509 has 4 divisors (see below), whose sum is σ = 2103516. Its totient is φ = 2025504.

The previous prime is 2064487. The next prime is 2064511. The reversal of 2064509 is 9054602.

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 1836025 + 228484 = 1355^2 + 478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2064509 is a prime.

It is a super-2 number, since 2×2064509² = 8524394822162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064529) 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, 19424 + ... + 19529.

It is an arithmetic number, because the mean of its divisors is an integer number (525879).

2^2064509 is an apocalyptic number.

It is an amenable number.

2064509 is a deficient number, since it is larger than the sum of its proper divisors (39007).

2064509 is an equidigital number, since it uses as much as digits as its factorization.

2064509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39006.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2064509 is about 1436.8399354138. The cubic root of 2064509 is about 127.3324005731.

The spelling of 2064509 in words is "two million, sixty-four thousand, five hundred nine".