423021 has 12 divisors (see below), whose sum is σ = 585312. Its totient is φ = 271728.

The previous prime is 423019. The next prime is 423043. The reversal of 423021 is 120324.

It is not a de Polignac number, because 423021 - 2¹ = 423019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 422988 and 423006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423001) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4056 + ... + 4158.

It is an arithmetic number, because the mean of its divisors is an integer number (48776).

2⁴²³⁰²¹ is an apocalyptic number.

It is an amenable number.

423021 is a deficient number, since it is larger than the sum of its proper divisors (162291).

423021 is a wasteful number, since it uses less digits than its factorization.

423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 423021 is about 650.4006457561. The cubic root of 423021 is about 75.0678497115.

Adding to 423021 its reverse (120324), we get a palindrome (543345).

The spelling of 423021 in words is "four hundred twenty-three thousand, twenty-one", and thus it is an iban number.