321423641 has 64 divisors (see below), whose sum is σ = 446777856. Its totient is φ = 223641600.

The previous prime is 321423631. The next prime is 321423649. The reversal of 321423641 is 146324123.

It is not a de Polignac number, because 321423641 - 2¹⁰ = 321422617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321423641.

It is not an unprimeable number, because it can be changed into a prime (321423649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2844401 + ... + 2844513.

It is an arithmetic number, because the mean of its divisors is an integer number (6980904).

Almost surely, 2^321423641 is an apocalyptic number.

It is an amenable number.

321423641 is a deficient number, since it is larger than the sum of its proper divisors (125354215).

321423641 is a wasteful number, since it uses less digits than its factorization.

321423641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242.

The product of its digits is 3456, while the sum is 26.

The square root of 321423641 is about 17928.2916364053. The cubic root of 321423641 is about 685.0032081119.

Adding to 321423641 its reverse (146324123), we get a palindrome (467747764).

The spelling of 321423641 in words is "three hundred twenty-one million, four hundred twenty-three thousand, six hundred forty-one".