1331992 has 16 divisors (see below), whose sum is σ = 2514960. Its totient is φ = 661344.

The previous prime is 1331989. The next prime is 1332017. The reversal of 1331992 is 2991331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331992.

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, 838 + ... + 1834.

It is an arithmetic number, because the mean of its divisors is an integer number (157185).

2^1331992 is an apocalyptic number.

It is an amenable number.

1331992 is a deficient number, since it is larger than the sum of its proper divisors (1182968).

1331992 is a wasteful number, since it uses less digits than its factorization.

1331992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170 (or 1166 counting only the distinct ones).

The product of its digits is 1458, while the sum is 28.

The square root of 1331992 is about 1154.1195778601. The cubic root of 1331992 is about 110.0273210373.

The spelling of 1331992 in words is "one million, three hundred thirty-one thousand, nine hundred ninety-two".