2421430421 has 4 divisors (see below), whose sum is σ = 2421547200. Its totient is φ = 2421313644.

The previous prime is 2421430397. The next prime is 2421430423. The reversal of 2421430421 is 1240341242.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2421430421 - 2³⁰ = 1347688597 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 (2421430423) 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, 17951 + ... + 71868.

It is an arithmetic number, because the mean of its divisors is an integer number (605386800).

Almost surely, 2^2421430421 is an apocalyptic number.

It is an amenable number.

2421430421 is a deficient number, since it is larger than the sum of its proper divisors (116779).

2421430421 is an equidigital number, since it uses as much as digits as its factorization.

2421430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116778.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2421430421 is about 49208.0320781069. The cubic root of 2421430421 is about 1342.8391612000.

Adding to 2421430421 its reverse (1240341242), we get a palindrome (3661771663).

The spelling of 2421430421 in words is "two billion, four hundred twenty-one million, four hundred thirty thousand, four hundred twenty-one".