9720042 has 16 divisors (see below), whose sum is σ = 19714752. Its totient is φ = 3194240.

The previous prime is 9720037. The next prime is 9720043. The reversal of 9720042 is 2400279.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9719994 and 9720021.

It is not an unprimeable number, because it can be changed into a prime (9720043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10983 + ... + 11834.

It is an arithmetic number, because the mean of its divisors is an integer number (1232172).

Almost surely, 2^9720042 is an apocalyptic number.

9720042 is an abundant number, since it is smaller than the sum of its proper divisors (9994710).

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

9720042 is a wasteful number, since it uses less digits than its factorization.

9720042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22893.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 9720042 is about 3117.6981893698. The cubic root of 9720042 is about 213.4139056548.

The spelling of 9720042 in words is "nine million, seven hundred twenty thousand, forty-two".