128322321 has 8 divisors (see below), whose sum is σ = 172666560. Its totient is φ = 84763152.

The previous prime is 128322319. The next prime is 128322349. The reversal of 128322321 is 123223821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128322321 - 2¹ = 128322319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128322291 and 128322300.

It is not an unprimeable number, because it can be changed into a prime (128322301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195885 + ... + 196538.

It is an arithmetic number, because the mean of its divisors is an integer number (21583320).

Almost surely, 2^128322321 is an apocalyptic number.

It is an amenable number.

128322321 is a deficient number, since it is larger than the sum of its proper divisors (44344239).

128322321 is a wasteful number, since it uses less digits than its factorization.

128322321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392535.

The product of its digits is 1152, while the sum is 24.

The square root of 128322321 is about 11327.9442530408. The cubic root of 128322321 is about 504.3910851854.

The spelling of 128322321 in words is "one hundred twenty-eight million, three hundred twenty-two thousand, three hundred twenty-one".