423453021 has 8 divisors (see below), whose sum is σ = 568200864. Its totient is φ = 280503600.

The previous prime is 423453013. The next prime is 423453031. The reversal of 423453021 is 120354324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 423453021 - 2³ = 423453013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423452982 and 423453000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423453031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449055 + ... + 449996.

It is an arithmetic number, because the mean of its divisors is an integer number (71025108).

Almost surely, 2^423453021 is an apocalyptic number.

It is an amenable number.

423453021 is a deficient number, since it is larger than the sum of its proper divisors (144747843).

423453021 is a wasteful number, since it uses less digits than its factorization.

423453021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899211.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 423453021 is about 20577.9741714290. The cubic root of 423453021 is about 750.9339600310.

The spelling of 423453021 in words is "four hundred twenty-three million, four hundred fifty-three thousand, twenty-one".