1985199 has 8 divisors (see below), whose sum is σ = 2762112. Its totient is φ = 1265880.

The previous prime is 1985189. The next prime is 1985213. The reversal of 1985199 is 9915891.

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

It is not a de Polignac number, because 1985199 - 2⁴ = 1985183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1985199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985189) 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 7 ways as a sum of consecutive naturals, for example, 14317 + ... + 14454.

It is an arithmetic number, because the mean of its divisors is an integer number (345264).

2^1985199 is an apocalyptic number.

1985199 is a deficient number, since it is larger than the sum of its proper divisors (776913).

1985199 is a wasteful number, since it uses less digits than its factorization.

1985199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28797.

The product of its digits is 29160, while the sum is 42.

The square root of 1985199 is about 1408.9709010480. The cubic root of 1985199 is about 125.6805336018.

The spelling of 1985199 in words is "one million, nine hundred eighty-five thousand, one hundred ninety-nine".