478021 has 8 divisors (see below), whose sum is σ = 509600. Its totient is φ = 447120.

The previous prime is 478001. The next prime is 478039. The reversal of 478021 is 120874.

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

It is a cyclic number.

It is not a de Polignac number, because 478021 - 2¹¹ = 475973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 477983 and 478001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 2731.

It is an arithmetic number, because the mean of its divisors is an integer number (63700).

2⁴⁷⁸⁰²¹ is an apocalyptic number.

It is an amenable number.

478021 is a deficient number, since it is larger than the sum of its proper divisors (31579).

478021 is a wasteful number, since it uses less digits than its factorization.

478021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 478021 is about 691.3906276484. The cubic root of 478021 is about 78.1896001153.

Adding to 478021 its reverse (120874), we get a palindrome (598895).

The spelling of 478021 in words is "four hundred seventy-eight thousand, twenty-one".