321040845 has 18 divisors (see below), whose sum is σ = 556679214. Its totient is φ = 171157680.

The previous prime is 321040807. The next prime is 321040849. The reversal of 321040845 is 548040123.

321040845 is a `hidden beast` number, since 3 + 210 + 408 + 45 = 666.

It can be written as a sum of positive squares in only one way, i.e., 256832676 + 64208169 = 16026^2 + 8013^2 .

It is not a de Polignac number, because 321040845 - 2⁶ = 321040781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321040849) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 118860 + ... + 121530.

It is an arithmetic number, because the mean of its divisors is an integer number (30926623).

Almost surely, 2^321040845 is an apocalyptic number.

It is an amenable number.

321040845 is a deficient number, since it is larger than the sum of its proper divisors (235638369).

321040845 is an frugal number, since it uses more digits than its factorization.

321040845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353 (or 2679 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 321040845 is about 17917.6127037058. The cubic root of 321040845 is about 684.7311677077.

Adding to 321040845 its reverse (548040123), we get a palindrome (869080968).

The spelling of 321040845 in words is "three hundred twenty-one million, forty thousand, eight hundred forty-five".