2120209 has 16 divisors (see below), whose sum is σ = 2725632. Its totient is φ = 1603008.

The previous prime is 2120207. The next prime is 2120213. The reversal of 2120209 is 9020212.

It is a happy number.

It is not a de Polignac number, because 2120209 - 2¹ = 2120207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120192 and 2120201.

It is not an unprimeable number, because it can be changed into a prime (2120203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1587 + ... + 2599.

It is an arithmetic number, because the mean of its divisors is an integer number (170352).

2^2120209 is an apocalyptic number.

It is an amenable number.

2120209 is a deficient number, since it is larger than the sum of its proper divisors (605423).

2120209 is a wasteful number, since it uses less digits than its factorization.

2120209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2120209 is about 1456.0937469820. The cubic root of 2120209 is about 128.4673871422.

The spelling of 2120209 in words is "two million, one hundred twenty thousand, two hundred nine".