423121564 has 12 divisors (see below), whose sum is σ = 779434600. Its totient is φ = 200425968.

The previous prime is 423121553. The next prime is 423121577. The reversal of 423121564 is 465121324.

It is a congruent number.

It is an unprimeable number.

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, 2783619 + ... + 2783770.

Almost surely, 2^423121564 is an apocalyptic number.

It is an amenable number.

423121564 is a deficient number, since it is larger than the sum of its proper divisors (356313036).

423121564 is a wasteful number, since it uses less digits than its factorization.

423121564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567412 (or 5567410 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 423121564 is about 20569.9189108757. The cubic root of 423121564 is about 750.7379782053.

Adding to 423121564 its reverse (465121324), we get a palindrome (888242888).

The spelling of 423121564 in words is "four hundred twenty-three million, one hundred twenty-one thousand, five hundred sixty-four".