1001992 has 16 divisors (see below), whose sum is σ = 1890000. Its totient is φ = 498000.

The previous prime is 1001989. The next prime is 1002017. The reversal of 1001992 is 2991001.

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, 1759 + ... + 2257.

It is an arithmetic number, because the mean of its divisors is an integer number (118125).

2^1001992 is an apocalyptic number.

It is an amenable number.

1001992 is a deficient number, since it is larger than the sum of its proper divisors (888008).

1001992 is a wasteful number, since it uses less digits than its factorization.

1001992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1001992 is about 1000.9955044854. The cubic root of 1001992 is about 100.0663559591.

Adding to 1001992 its reverse (2991001), we get a palindrome (3992993).

The spelling of 1001992 in words is "one million, one thousand, nine hundred ninety-two".