2065209 has 4 divisors (see below), whose sum is σ = 2753616. Its totient is φ = 1376804.

The previous prime is 2065187. The next prime is 2065213. The reversal of 2065209 is 9025602.

2065209 = T₄₇₀ + T₄₇₁ + ... + T₄₈₇.

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 2065209 - 2¹² = 2061113 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2065309) 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, 344199 + ... + 344204.

It is an arithmetic number, because the mean of its divisors is an integer number (688404).

2^2065209 is an apocalyptic number.

It is an amenable number.

2065209 is a deficient number, since it is larger than the sum of its proper divisors (688407).

2065209 is an equidigital number, since it uses as much as digits as its factorization.

2065209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688406.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2065209 is about 1437.0835048806. The cubic root of 2065209 is about 127.3467902106.

The spelling of 2065209 in words is "two million, sixty-five thousand, two hundred nine".