321478641 has 24 divisors (see below), whose sum is σ = 513523296. Its totient is φ = 192162240.

The previous prime is 321478631. The next prime is 321478667. The reversal of 321478641 is 146874123.

321478641 is a `hidden beast` number, since 3 + 2 + 1 + 4 + 7 + 8 + 641 = 666.

It is not a de Polignac number, because 321478641 - 2⁵ = 321478609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321478596 and 321478605.

It is not an unprimeable number, because it can be changed into a prime (321478631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15015 + ... + 29468.

It is an arithmetic number, because the mean of its divisors is an integer number (21396804).

Almost surely, 2^321478641 is an apocalyptic number.

It is an amenable number.

321478641 is a deficient number, since it is larger than the sum of its proper divisors (192044655).

321478641 is a wasteful number, since it uses less digits than its factorization.

321478641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44573 (or 44570 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 321478641 is about 17929.8254592732. The cubic root of 321478641 is about 685.0422770362.

The spelling of 321478641 in words is "three hundred twenty-one million, four hundred seventy-eight thousand, six hundred forty-one".