478517 has 4 divisors (see below), whose sum is σ = 515340. Its totient is φ = 441696.

The previous prime is 478493. The next prime is 478523. The reversal of 478517 is 715874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 119716 + 358801 = 346^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 478517 - 2⁶ = 478453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 478517.

It is not an unprimeable number, because it can be changed into a prime (478417) 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, 18392 + ... + 18417.

It is an arithmetic number, because the mean of its divisors is an integer number (128835).

2⁴⁷⁸⁵¹⁷ is an apocalyptic number.

It is an amenable number.

478517 is a deficient number, since it is larger than the sum of its proper divisors (36823).

478517 is a wasteful number, since it uses less digits than its factorization.

478517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36822.

The product of its digits is 7840, while the sum is 32.

The square root of 478517 is about 691.7492320198. The cubic root of 478517 is about 78.2166342385.

The spelling of 478517 in words is "four hundred seventy-eight thousand, five hundred seventeen".