423121144 has 8 divisors (see below), whose sum is σ = 793352160. Its totient is φ = 211560568.

The previous prime is 423121141. The next prime is 423121169. The reversal of 423121144 is 441121324.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423121141) 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 as a sum of consecutive naturals, namely, 26445064 + ... + 26445079.

It is an arithmetic number, because the mean of its divisors is an integer number (99169020).

Almost surely, 2^423121144 is an apocalyptic number.

It is an amenable number.

423121144 is a deficient number, since it is larger than the sum of its proper divisors (370231016).

423121144 is a wasteful number, since it uses less digits than its factorization.

423121144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52890149 (or 52890145 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 423121144 is about 20569.9087017906. The cubic root of 423121144 is about 750.7377298054.

Adding to 423121144 its reverse (441121324), we get a palindrome (864242468).

The spelling of 423121144 in words is "four hundred twenty-three million, one hundred twenty-one thousand, one hundred forty-four".