9640042 has 4 divisors (see below), whose sum is σ = 14460066. Its totient is φ = 4820020.

The previous prime is 9640031. The next prime is 9640051. The reversal of 9640042 is 2400469.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5755201 + 3884841 = 2399^2 + 1971^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9639989 and 9640016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2410009 + ... + 2410012.

Almost surely, 2^9640042 is an apocalyptic number.

9640042 is a deficient number, since it is larger than the sum of its proper divisors (4820024).

9640042 is a wasteful number, since it uses less digits than its factorization.

9640042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820023.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 9640042 is about 3104.8417028892. The cubic root of 9640042 is about 212.8267968262.

The spelling of 9640042 in words is "nine million, six hundred forty thousand, forty-two".