405995 has 4 divisors (see below), whose sum is σ = 487200. Its totient is φ = 324792.

The previous prime is 405991. The next prime is 405997. The reversal of 405995 is 599504.

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

It is a cyclic number.

It is not a de Polignac number, because 405995 - 2² = 405991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40595 + ... + 40604.

It is an arithmetic number, because the mean of its divisors is an integer number (121800).

2⁴⁰⁵⁹⁹⁵ is an apocalyptic number.

405995 is a deficient number, since it is larger than the sum of its proper divisors (81205).

405995 is an equidigital number, since it uses as much as digits as its factorization.

405995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81204.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 405995 is about 637.1773693408. The cubic root of 405995 is about 74.0469023335.

It can be divided in two parts, 40599 and 5, that added together give a palindrome (40604).

The spelling of 405995 in words is "four hundred five thousand, nine hundred ninety-five".