424335421 has 4 divisors (see below), whose sum is σ = 424620000. Its totient is φ = 424050844.

The previous prime is 424335391. The next prime is 424335427. The reversal of 424335421 is 124533424.

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 424335421 - 2⁵ = 424335389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 424335421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424335427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140041 + ... + 143038.

It is an arithmetic number, because the mean of its divisors is an integer number (106155000).

Almost surely, 2^424335421 is an apocalyptic number.

It is an amenable number.

424335421 is a deficient number, since it is larger than the sum of its proper divisors (284579).

424335421 is a wasteful number, since it uses less digits than its factorization.

424335421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284578.

The product of its digits is 11520, while the sum is 28.

The square root of 424335421 is about 20599.4034136914. The cubic root of 424335421 is about 751.4552019495.

Adding to 424335421 its reverse (124533424), we get a palindrome (548868845).

The spelling of 424335421 in words is "four hundred twenty-four million, three hundred thirty-five thousand, four hundred twenty-one".