321365945 has 4 divisors (see below), whose sum is σ = 385639140. Its totient is φ = 257092752.

The previous prime is 321365923. The next prime is 321365953. The reversal of 321365945 is 549563123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 256128016 + 65237929 = 16004^2 + 8077^2 .

It is a cyclic number.

It is not a de Polignac number, because 321365945 - 2⁶ = 321365881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321365899 and 321365908.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 32136590 + ... + 32136599.

It is an arithmetic number, because the mean of its divisors is an integer number (96409785).

Almost surely, 2^321365945 is an apocalyptic number.

It is an amenable number.

321365945 is a deficient number, since it is larger than the sum of its proper divisors (64273195).

321365945 is an equidigital number, since it uses as much as digits as its factorization.

321365945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64273194.

The product of its digits is 97200, while the sum is 38.

The square root of 321365945 is about 17926.6824872869. The cubic root of 321365945 is about 684.9622193097.

The spelling of 321365945 in words is "three hundred twenty-one million, three hundred sixty-five thousand, nine hundred forty-five".