424001321 has 4 divisors (see below), whose sum is σ = 446317200. Its totient is φ = 401685444.

The previous prime is 424001287. The next prime is 424001329. The reversal of 424001321 is 123100424.

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 424001321 - 2¹⁸ = 423739177 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 424001321.

It is not an unprimeable number, because it can be changed into a prime (424001329) 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, 11157911 + ... + 11157948.

It is an arithmetic number, because the mean of its divisors is an integer number (111579300).

Almost surely, 2^424001321 is an apocalyptic number.

It is an amenable number.

424001321 is a deficient number, since it is larger than the sum of its proper divisors (22315879).

424001321 is a wasteful number, since it uses less digits than its factorization.

424001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22315878.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 424001321 is about 20591.2923586646. The cubic root of 424001321 is about 751.2579310405.

Adding to 424001321 its reverse (123100424), we get a palindrome (547101745).

The spelling of 424001321 in words is "four hundred twenty-four million, one thousand, three hundred twenty-one".