1404321 has 4 divisors (see below), whose sum is σ = 1872432. Its totient is φ = 936212.

The previous prime is 1404289. The next prime is 1404323. The reversal of 1404321 is 1234041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1234041 = 3 ⋅411347.

It is a cyclic number.

It is not a de Polignac number, because 1404321 - 2⁵ = 1404289 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1404321.

It is not an unprimeable number, because it can be changed into a prime (1404323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234051 + ... + 234056.

It is an arithmetic number, because the mean of its divisors is an integer number (468108).

2^1404321 is an apocalyptic number.

It is an amenable number.

1404321 is a deficient number, since it is larger than the sum of its proper divisors (468111).

1404321 is an equidigital number, since it uses as much as digits as its factorization.

1404321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468110.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1404321 is about 1185.0405056368. The cubic root of 1404321 is about 111.9838677870.

Subtracting from 1404321 its product of nonzero digits (96), we obtain a square (1404225 = 1185²).

Adding to 1404321 its reverse (1234041), we get a palindrome (2638362).

The spelling of 1404321 in words is "one million, four hundred four thousand, three hundred twenty-one".