478621 has 8 divisors (see below), whose sum is σ = 562464. Its totient is φ = 401520.

The previous prime is 478603. The next prime is 478627. The reversal of 478621 is 126874.

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 478621 - 2⁵ = 478589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478627) 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, 1531 + ... + 1816.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2⁴⁷⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

478621 is a deficient number, since it is larger than the sum of its proper divisors (83843).

478621 is a wasteful number, since it uses less digits than its factorization.

478621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371.

The product of its digits is 2688, while the sum is 28.

The square root of 478621 is about 691.8243996854. The cubic root of 478621 is about 78.2223003143. Note that the first 3 decimals are identical.

It can be divided in two parts, 47 and 8621, that added together give a palindrome (8668).

The spelling of 478621 in words is "four hundred seventy-eight thousand, six hundred twenty-one".