423065021 has 8 divisors (see below), whose sum is σ = 438528600. Its totient is φ = 407659840.

The previous prime is 423064997. The next prime is 423065023. The reversal of 423065021 is 120560324.

It can be written as a sum of positive squares in 4 ways, for example, as 262764100 + 160300921 = 16210^2 + 12661^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423065021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423065023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431 + ... + 29091.

It is an arithmetic number, because the mean of its divisors is an integer number (54816075).

Almost surely, 2^423065021 is an apocalyptic number.

It is an amenable number.

423065021 is a deficient number, since it is larger than the sum of its proper divisors (15463579).

423065021 is a wasteful number, since it uses less digits than its factorization.

423065021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29199.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 423065021 is about 20568.5444550654. The cubic root of 423065021 is about 750.7045355952.

The spelling of 423065021 in words is "four hundred twenty-three million, sixty-five thousand, twenty-one".