999997042 has 8 divisors (see below), whose sum is σ = 1636358832. Its totient is φ = 454544100.

The previous prime is 999997021. The next prime is 999997049. The reversal of 999997042 is 240799999.

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

It is not an unprimeable number, because it can be changed into a prime (999997049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22727184 + ... + 22727227.

It is an arithmetic number, because the mean of its divisors is an integer number (204544854).

Almost surely, 2^999997042 is an apocalyptic number.

999997042 is a deficient number, since it is larger than the sum of its proper divisors (636361790).

999997042 is a wasteful number, since it uses less digits than its factorization.

999997042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45454424.

The product of its (nonzero) digits is 3306744, while the sum is 58.

The square root of 999997042 is about 31622.7298315626. The cubic root of 999997042 is about 999.9990139990. Note that the first 3 decimals are identical.

The spelling of 999997042 in words is "nine hundred ninety-nine million, nine hundred ninety-seven thousand, forty-two".