1991852 has 6 divisors (see below), whose sum is σ = 3485748. Its totient is φ = 995924.

The previous prime is 1991849. The next prime is 1991861. The reversal of 1991852 is 2581991.

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 as a sum of consecutive naturals, namely, 248978 + ... + 248985.

It is an arithmetic number, because the mean of its divisors is an integer number (580958).

2^1991852 is an apocalyptic number.

It is an amenable number.

1991852 is a deficient number, since it is larger than the sum of its proper divisors (1493896).

1991852 is a wasteful number, since it uses less digits than its factorization.

1991852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497967 (or 497965 counting only the distinct ones).

The product of its digits is 6480, while the sum is 35.

The square root of 1991852 is about 1411.3298693077. The cubic root of 1991852 is about 125.8207748335.

The spelling of 1991852 in words is "one million, nine hundred ninety-one thousand, eight hundred fifty-two".