406506 has 8 divisors (see below), whose sum is σ = 813024. Its totient is φ = 135500.

The previous prime is 406501. The next prime is 406507. The reversal of 406506 is 605604.

It is a sphenic number, since it is the product of 3 distinct primes.

406506 is an admirable number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406506.

It is not an unprimeable number, because it can be changed into a prime (406501) 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, 33870 + ... + 33881.

It is an arithmetic number, because the mean of its divisors is an integer number (101628).

2⁴⁰⁶⁵⁰⁶ is an apocalyptic number.

406506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406506 is a wasteful number, since it uses less digits than its factorization.

406506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67756.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 406506 is about 637.5782304941. The cubic root of 406506 is about 74.0779553460.

The spelling of 406506 in words is "four hundred six thousand, five hundred six".