2071209 has 32 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 1076544.

The previous prime is 2071193. The next prime is 2071213. The reversal of 2071209 is 9021702.

It is a happy number.

It is not a de Polignac number, because 2071209 - 2⁴ = 2071193 is a prime.

It is a super-3 number, since 3×2071209³ = 26655880233318546987, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2071259) 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 31 ways as a sum of consecutive naturals, for example, 11482 + ... + 11660.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2^2071209 is an apocalyptic number.

2071209 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2071209 is a deficient number, since it is larger than the sum of its proper divisors (1384791).

2071209 is a wasteful number, since it uses less digits than its factorization.

2071209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 2071209 is about 1439.1695522071. The cubic root of 2071209 is about 127.4699967849.

The spelling of 2071209 in words is "two million, seventy-one thousand, two hundred nine".