9999042 has 8 divisors (see below), whose sum is σ = 19998096. Its totient is φ = 3333012.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9999042 is 2409999.

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

9999042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 9998985 and 9999003.

It is not an unprimeable number, because it can be changed into a prime (9999047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833248 + ... + 833259.

It is an arithmetic number, because the mean of its divisors is an integer number (2499762).

Almost surely, 2^9999042 is an apocalyptic number.

9999042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

9999042 is a wasteful number, since it uses less digits than its factorization.

9999042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666512.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 9999042 is about 3162.1261834405. The cubic root of 9999042 is about 215.4365889554.

The spelling of 9999042 in words is "nine million, nine hundred ninety-nine thousand, forty-two".