1999854 has 12 divisors (see below), whose sum is σ = 4333056. Its totient is φ = 666612.

The previous prime is 1999853. The next prime is 1999859. The reversal of 1999854 is 4589991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55534 + ... + 55569.

It is an arithmetic number, because the mean of its divisors is an integer number (361088).

2^1999854 is an apocalyptic number.

1999854 is an abundant number, since it is smaller than the sum of its proper divisors (2333202).

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

1999854 is a wasteful number, since it uses less digits than its factorization.

1999854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111111 (or 111108 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 1999854 is about 1414.1619426360. The cubic root of 1999854 is about 125.9890391070.

The spelling of 1999854 in words is "one million, nine hundred ninety-nine thousand, eight hundred fifty-four".