1331889 has 24 divisors (see below), whose sum is σ = 2002752. Its totient is φ = 786240.

The previous prime is 1331857. The next prime is 1331921. The reversal of 1331889 is 9881331.

It is an interprime number because it is at equal distance from previous prime (1331857) and next prime (1331921).

It is not a de Polignac number, because 1331889 - 2⁵ = 1331857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18724 + ... + 18794.

It is an arithmetic number, because the mean of its divisors is an integer number (83448).

2^1331889 is an apocalyptic number.

It is an amenable number.

1331889 is a deficient number, since it is larger than the sum of its proper divisors (670863).

1331889 is a wasteful number, since it uses less digits than its factorization.

1331889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 124 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 1331889 is about 1154.0749542382. The cubic root of 1331889 is about 110.0244849076.

The spelling of 1331889 in words is "one million, three hundred thirty-one thousand, eight hundred eighty-nine".