1999242 has 80 divisors (see below), whose sum is σ = 5366592. Its totient is φ = 544320.

The previous prime is 1999223. The next prime is 1999243. The reversal of 1999242 is 2429991.

It is a junction number, because it is equal to n+sod(n) for n = 1999197 and 1999206.

It is not an unprimeable number, because it can be changed into a prime (1999243) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46473 + ... + 46515.

2^1999242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2683296).

1999242 is an abundant number, since it is smaller than the sum of its proper divisors (3367350).

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

1999242 is a wasteful number, since it uses less digits than its factorization.

1999242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 96 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 1999242 is about 1413.9455435058. The cubic root of 1999242 is about 125.9761859756.

The spelling of 1999242 in words is "one million, nine hundred ninety-nine thousand, two hundred forty-two".