9920042 has 16 divisors (see below), whose sum is σ = 16308864. Its totient is φ = 4488000.

The previous prime is 9920041. The next prime is 9920047. The reversal of 9920042 is 2400299.

It is a junction number, because it is equal to n+sod(n) for n = 9919993 and 9920020.

It is not an unprimeable number, because it can be changed into a prime (9920041) 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, 4367 + ... + 6237.

It is an arithmetic number, because the mean of its divisors is an integer number (1019304).

Almost surely, 2^9920042 is an apocalyptic number.

9920042 is a deficient number, since it is larger than the sum of its proper divisors (6388822).

9920042 is a wasteful number, since it uses less digits than its factorization.

9920042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 9920042 is about 3149.6098171043. The cubic root of 9920042 is about 214.8677174377.

The spelling of 9920042 in words is "nine million, nine hundred twenty thousand, forty-two".