423004021 has 12 divisors (see below), whose sum is σ = 479957632. Its totient is φ = 372141000.

The previous prime is 423004009. The next prime is 423004033. The reversal of 423004021 is 120400324.

It is an interprime number because it is at equal distance from previous prime (423004009) and next prime (423004033).

It is not a de Polignac number, because 423004021 - 2²³ = 414615413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423003986 and 423004004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423004061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52635 + ... + 60136.

Almost surely, 2^423004021 is an apocalyptic number.

It is an amenable number.

423004021 is a deficient number, since it is larger than the sum of its proper divisors (56953611).

423004021 is a wasteful number, since it uses less digits than its factorization.

423004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112824 (or 112813 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 423004021 is about 20567.0615548260. The cubic root of 423004021 is about 750.6684535310.

Adding to 423004021 its reverse (120400324), we get a palindrome (543404345).

The spelling of 423004021 in words is "four hundred twenty-three million, four thousand, twenty-one".