1331304 has 64 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 384000.

The previous prime is 1331299. The next prime is 1331327. The reversal of 1331304 is 4031331.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5179 + ... + 5429.

It is an arithmetic number, because the mean of its divisors is an integer number (59535).

2^1331304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1905120).

1331304 is an abundant number, since it is smaller than the sum of its proper divisors (2478936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331304 is a wasteful number, since it uses less digits than its factorization.

1331304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1331304 is about 1153.8214766592. The cubic root of 1331304 is about 110.0083740181.

Adding to 1331304 its reverse (4031331), we get a palindrome (5362635).

The spelling of 1331304 in words is "one million, three hundred thirty-one thousand, three hundred four".