2421909 has 24 divisors (see below), whose sum is σ = 4110080. Its totient is φ = 1345248.

The previous prime is 2421907. The next prime is 2421917. The reversal of 2421909 is 9091242.

2421909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2421909 - 2¹ = 2421907 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1812 + ... + 2850.

2^2421909 is an apocalyptic number.

It is an amenable number.

2421909 is a deficient number, since it is larger than the sum of its proper divisors (1688171).

2421909 is a wasteful number, since it uses less digits than its factorization.

2421909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2421909 is about 1556.2483734931. The cubic root of 2421909 is about 134.2927623001.

The spelling of 2421909 in words is "two million, four hundred twenty-one thousand, nine hundred nine".