405321043 has 4 divisors (see below), whose sum is σ = 405362800. Its totient is φ = 405279288.

The previous prime is 405321017. The next prime is 405321047. The reversal of 405321043 is 340123504.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405321043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405321047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146 + ... + 28552.

It is an arithmetic number, because the mean of its divisors is an integer number (101340700).

Almost surely, 2^405321043 is an apocalyptic number.

405321043 is a deficient number, since it is larger than the sum of its proper divisors (41757).

405321043 is a wasteful number, since it uses less digits than its factorization.

405321043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41756.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 405321043 is about 20132.5865948715. The cubic root of 405321043 is about 740.0590669920.

Adding to 405321043 its reverse (340123504), we get a palindrome (745444547).

The spelling of 405321043 in words is "four hundred five million, three hundred twenty-one thousand, forty-three".