405230321 has 4 divisors (see below), whose sum is σ = 405276144. Its totient is φ = 405184500.

The previous prime is 405230297. The next prime is 405230333. The reversal of 405230321 is 123032504.

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, 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 405230321 - 2⁶ = 405230257 is a prime.

It is a super-2 number, since 2×405230321² = 328423226115526082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 405230293 and 405230302.

It is not an unprimeable number, because it can be changed into a prime (405230341) 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, 4955 + ... + 28896.

It is an arithmetic number, because the mean of its divisors is an integer number (101319036).

Almost surely, 2^405230321 is an apocalyptic number.

It is an amenable number.

405230321 is a deficient number, since it is larger than the sum of its proper divisors (45823).

405230321 is a wasteful number, since it uses less digits than its factorization.

405230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45822.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 405230321 is about 20130.3333554117. Note that the first 4 decimals coincide. The cubic root of 405230321 is about 740.0038476790.

Adding to 405230321 its reverse (123032504), we get a palindrome (528262825).

The spelling of 405230321 in words is "four hundred five million, two hundred thirty thousand, three hundred twenty-one".