2421709 has 4 divisors (see below), whose sum is σ = 2428416. Its totient is φ = 2415004.

The previous prime is 2421707. The next prime is 2421733. The reversal of 2421709 is 9071242.

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 2421709 - 2¹ = 2421707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421707) 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, 2779 + ... + 3544.

It is an arithmetic number, because the mean of its divisors is an integer number (607104).

2^2421709 is an apocalyptic number.

It is an amenable number.

2421709 is a deficient number, since it is larger than the sum of its proper divisors (6707).

2421709 is an equidigital number, since it uses as much as digits as its factorization.

2421709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6706.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2421709 is about 1556.1841150712. The cubic root of 2421709 is about 134.2890655893.

The spelling of 2421709 in words is "two million, four hundred twenty-one thousand, seven hundred nine".