1398321 has 12 divisors (see below), whose sum is σ = 2031120. Its totient is φ = 927000.

The previous prime is 1398307. The next prime is 1398323. The reversal of 1398321 is 1238931.

It is not a de Polignac number, because 1398321 - 2⁵ = 1398289 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1398323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1950 + ... + 2568.

It is an arithmetic number, because the mean of its divisors is an integer number (169260).

2^1398321 is an apocalyptic number.

It is an amenable number.

1398321 is a deficient number, since it is larger than the sum of its proper divisors (632799).

1398321 is a wasteful number, since it uses less digits than its factorization.

1398321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 873 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1398321 is about 1182.5062367700. The cubic root of 1398321 is about 111.8241553963.

The spelling of 1398321 in words is "one million, three hundred ninety-eight thousand, three hundred twenty-one".