2420209 has 4 divisors (see below), whose sum is σ = 2640240. Its totient is φ = 2200180.

The previous prime is 2420179. The next prime is 2420213. The reversal of 2420209 is 9020242.

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 2420209 - 2¹¹ = 2418161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2420269) 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 3 ways as a sum of consecutive naturals, for example, 109999 + ... + 110020.

It is an arithmetic number, because the mean of its divisors is an integer number (660060).

2^2420209 is an apocalyptic number.

It is an amenable number.

2420209 is a deficient number, since it is larger than the sum of its proper divisors (220031).

2420209 is a wasteful number, since it uses less digits than its factorization.

2420209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220030.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2420209 is about 1555.7020923043. The cubic root of 2420209 is about 134.2613337682.

The spelling of 2420209 in words is "two million, four hundred twenty thousand, two hundred nine".