423107521 has 4 divisors (see below), whose sum is σ = 426151600. Its totient is φ = 420063444.

The previous prime is 423107519. The next prime is 423107527. The reversal of 423107521 is 125701324.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 423107521 - 2¹ = 423107519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423107527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521831 + ... + 1522108.

It is an arithmetic number, because the mean of its divisors is an integer number (106537900).

Almost surely, 2^423107521 is an apocalyptic number.

It is an amenable number.

423107521 is a deficient number, since it is larger than the sum of its proper divisors (3044079).

423107521 is a wasteful number, since it uses less digits than its factorization.

423107521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044078.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 423107521 is about 20569.5775600764. The cubic root of 423107521 is about 750.7296726883.

Adding to 423107521 its reverse (125701324), we get a palindrome (548808845).

The spelling of 423107521 in words is "four hundred twenty-three million, one hundred seven thousand, five hundred twenty-one".