1331004 has 12 divisors (see below), whose sum is σ = 3105704. Its totient is φ = 443664.

The previous prime is 1330997. The next prime is 1331023. The reversal of 1331004 is 4001331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 110917 = 1331004 / (1 + 3 + 3 + 1 + 0 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

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, 55447 + ... + 55470.

2^1331004 is an apocalyptic number.

It is an amenable number.

1331004 is an abundant number, since it is smaller than the sum of its proper divisors (1774700).

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

1331004 is a wasteful number, since it uses less digits than its factorization.

1331004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110924 (or 110922 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1331004 is about 1153.6914665542. The cubic root of 1331004 is about 110.0001101927. Note that the first 3 decimals are identical.

Adding to 1331004 its reverse (4001331), we get a palindrome (5332335).

The spelling of 1331004 in words is "one million, three hundred thirty-one thousand, four".