2430921 has 4 divisors (see below), whose sum is σ = 3241232. Its totient is φ = 1620612.

The previous prime is 2430913. The next prime is 2430929. The reversal of 2430921 is 1290342.

2430921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (2430913) and next prime (2430929).

It is not a de Polignac number, because 2430921 - 2³ = 2430913 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2430929) 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 3 ways as a sum of consecutive naturals, for example, 405151 + ... + 405156.

It is an arithmetic number, because the mean of its divisors is an integer number (810308).

2^2430921 is an apocalyptic number.

It is an amenable number.

2430921 is a deficient number, since it is larger than the sum of its proper divisors (810311).

2430921 is an equidigital number, since it uses as much as digits as its factorization.

2430921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810310.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2430921 is about 1559.1411097139. The cubic root of 2430921 is about 134.4591253286.

The spelling of 2430921 in words is "two million, four hundred thirty thousand, nine hundred twenty-one".