1228321 has 8 divisors (see below), whose sum is σ = 1267200. Its totient is φ = 1190160.

The previous prime is 1228309. The next prime is 1228327. The reversal of 1228321 is 1238221.

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

It is a cyclic number.

It is not a de Polignac number, because 1228321 - 2⁷ = 1228193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228327) 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, 6336 + ... + 6526.

It is an arithmetic number, because the mean of its divisors is an integer number (158400).

2^1228321 is an apocalyptic number.

It is an amenable number.

1228321 is a deficient number, since it is larger than the sum of its proper divisors (38879).

1228321 is a wasteful number, since it uses less digits than its factorization.

1228321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its digits is 192, while the sum is 19.

The square root of 1228321 is about 1108.2964404887. The cubic root of 1228321 is about 107.0953527398.

The spelling of 1228321 in words is "one million, two hundred twenty-eight thousand, three hundred twenty-one".