405563 has 4 divisors (see below), whose sum is σ = 414240. Its totient is φ = 396888.

The previous prime is 405553. The next prime is 405577. The reversal of 405563 is 365504.

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 405563 - 2⁶ = 405499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4268 + ... + 4361.

It is an arithmetic number, because the mean of its divisors is an integer number (103560).

2⁴⁰⁵⁵⁶³ is an apocalyptic number.

405563 is a deficient number, since it is larger than the sum of its proper divisors (8677).

405563 is an equidigital number, since it uses as much as digits as its factorization.

405563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8676.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 405563 is about 636.8382840251. The cubic root of 405563 is about 74.0206297487.

The spelling of 405563 in words is "four hundred five thousand, five hundred sixty-three".