421224 has 16 divisors (see below), whose sum is σ = 1053120. Its totient is φ = 140400.

The previous prime is 421207. The next prime is 421241. The reversal of 421224 is 422124.

421224 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (421207) and next prime (421241).

It is a nude number because it is divisible by every one of its digits.

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, 8752 + ... + 8799.

It is an arithmetic number, because the mean of its divisors is an integer number (65820).

2⁴²¹²²⁴ is an apocalyptic number.

It is an amenable number.

421224 is an abundant number, since it is smaller than the sum of its proper divisors (631896).

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

421224 is a wasteful number, since it uses less digits than its factorization.

421224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17560 (or 17556 counting only the distinct ones).

The product of its digits is 128, while the sum is 15.

The square root of 421224 is about 649.0177193267. The cubic root of 421224 is about 74.9614023619.

Adding to 421224 its reverse (422124), we get a palindrome (843348).

Subtracting 421224 from its reverse (422124), we obtain a square (900 = 30²).

The spelling of 421224 in words is "four hundred twenty-one thousand, two hundred twenty-four", and thus it is an iban number.