1320404 has 12 divisors (see below), whose sum is σ = 2337300. Its totient is φ = 652608.

The previous prime is 1320391. The next prime is 1320409. The reversal of 1320404 is 4040231.

It can be written as a sum of positive squares in 2 ways, for example, as 300304 + 1020100 = 548^2 + 1010^2 .

1320404 is a modest number, since divided by 404 gives 132 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1499 + ... + 2210.

It is an arithmetic number, because the mean of its divisors is an integer number (194775).

2^1320404 is an apocalyptic number.

It is an amenable number.

1320404 is a deficient number, since it is larger than the sum of its proper divisors (1016896).

1320404 is a wasteful number, since it uses less digits than its factorization.

1320404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802 (or 3800 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1320404 is about 1149.0883342894. The cubic root of 1320404 is about 109.7073211286.

Adding to 1320404 its reverse (4040231), we get a palindrome (5360635).

The spelling of 1320404 in words is "one million, three hundred twenty thousand, four hundred four".