478505 has 4 divisors (see below), whose sum is σ = 574212. Its totient is φ = 382800.

The previous prime is 478493. The next prime is 478523. The reversal of 478505 is 505874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505874 = 2 ⋅252937.

It can be written as a sum of positive squares in 2 ways, for example, as 151321 + 327184 = 389^2 + 572^2 .

It is not a de Polignac number, because 478505 - 2⁶ = 478441 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 478505.

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, 47846 + ... + 47855.

It is an arithmetic number, because the mean of its divisors is an integer number (143553).

2⁴⁷⁸⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

478505 is a deficient number, since it is larger than the sum of its proper divisors (95707).

478505 is an equidigital number, since it uses as much as digits as its factorization.

478505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95706.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 478505 is about 691.7405583020. The cubic root of 478505 is about 78.2159804077.

The spelling of 478505 in words is "four hundred seventy-eight thousand, five hundred five".