405056 has 14 divisors (see below), whose sum is σ = 803910. Its totient is φ = 202496.

The previous prime is 405049. The next prime is 405071. The reversal of 405056 is 650504.

It can be written as a sum of positive squares in only one way, i.e., 379456 + 25600 = 616^2 + 160^2 .

It is an unprimeable number.

405056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3101 + ... + 3228.

2⁴⁰⁵⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

405056 is a deficient number, since it is larger than the sum of its proper divisors (398854).

405056 is an equidigital number, since it uses as much as digits as its factorization.

405056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341 (or 6331 counting only the distinct ones).

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

The square root of 405056 is about 636.4400993024. The cubic root of 405056 is about 73.9897721438.

The spelling of 405056 in words is "four hundred five thousand, fifty-six".