421228 has 24 divisors (see below), whose sum is σ = 788480. Its totient is φ = 196560.

The previous prime is 421207. The next prime is 421241. The reversal of 421228 is 822124.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5293 + ... + 5371.

2⁴²¹²²⁸ is an apocalyptic number.

It is an amenable number.

421228 is a deficient number, since it is larger than the sum of its proper divisors (367252).

421228 is a wasteful number, since it uses less digits than its factorization.

421228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 155 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 421228 is about 649.0208008993. The cubic root of 421228 is about 74.9616396424.

The spelling of 421228 in words is "four hundred twenty-one thousand, two hundred twenty-eight".