405065 has 4 divisors (see below), whose sum is σ = 486084. Its totient is φ = 324048.

The previous prime is 405049. The next prime is 405071. The reversal of 405065 is 560504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64009 + 341056 = 253^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 405065 - 2⁴ = 405049 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405065.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40502 + ... + 40511.

It is an arithmetic number, because the mean of its divisors is an integer number (121521).

2⁴⁰⁵⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

405065 is a deficient number, since it is larger than the sum of its proper divisors (81019).

405065 is an equidigital number, since it uses as much as digits as its factorization.

405065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81018.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 405065 is about 636.4471698421. The cubic root of 405065 is about 73.9903201363.

Adding to 405065 its reverse (560504), we get a palindrome (965569).

The spelling of 405065 in words is "four hundred five thousand, sixty-five".