421328 has 20 divisors (see below), whose sum is σ = 864900. Its totient is φ = 198144.

The previous prime is 421313. The next prime is 421331. The reversal of 421328 is 823124.

It can be written as a sum of positive squares in 2 ways, for example, as 238144 + 183184 = 488^2 + 428^2 .

It is a congruent number.

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, 503 + ... + 1046.

It is an arithmetic number, because the mean of its divisors is an integer number (43245).

2⁴²¹³²⁸ is an apocalyptic number.

It is an amenable number.

421328 is an abundant number, since it is smaller than the sum of its proper divisors (443572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421328 is a wasteful number, since it uses less digits than its factorization.

421328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1568 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 421328 is about 649.0978354609. The cubic root of 421328 is about 74.9675711655.

The spelling of 421328 in words is "four hundred twenty-one thousand, three hundred twenty-eight".