424423421 has 8 divisors (see below), whose sum is σ = 433075704. Its totient is φ = 415825920.

The previous prime is 424423409. The next prime is 424423427. The reversal of 424423421 is 124324424.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70795396 + 353628025 = 8414^2 + 18805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 424423421 - 2⁶ = 424423357 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 (424423427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2141 + ... + 29213.

It is an arithmetic number, because the mean of its divisors is an integer number (54134463).

Almost surely, 2^424423421 is an apocalyptic number.

It is an amenable number.

424423421 is a deficient number, since it is larger than the sum of its proper divisors (8652283).

424423421 is a wasteful number, since it uses less digits than its factorization.

424423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27391.

The product of its digits is 6144, while the sum is 26.

The square root of 424423421 is about 20601.5392871504. The cubic root of 424423421 is about 751.5071447317.

Adding to 424423421 its reverse (124324424), we get a palindrome (548747845).

The spelling of 424423421 in words is "four hundred twenty-four million, four hundred twenty-three thousand, four hundred twenty-one".