1331994 has 8 divisors (see below), whose sum is σ = 2664000. Its totient is φ = 443996.

The previous prime is 1331989. The next prime is 1332017. The reversal of 1331994 is 4991331.

It is a sphenic number, since it is the product of 3 distinct primes.

1331994 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110994 + ... + 111005.

It is an arithmetic number, because the mean of its divisors is an integer number (333000).

2^1331994 is an apocalyptic number.

1331994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1331994 is a wasteful number, since it uses less digits than its factorization.

1331994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222004.

The product of its digits is 2916, while the sum is 30.

The square root of 1331994 is about 1154.1204443211. The cubic root of 1331994 is about 110.0273761064.

The spelling of 1331994 in words is "one million, three hundred thirty-one thousand, nine hundred ninety-four".