9909542 has 4 divisors (see below), whose sum is σ = 14864316. Its totient is φ = 4954770.

The previous prime is 9909539. The next prime is 9909551. The reversal of 9909542 is 2459099.

9909542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 9909496 and 9909505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2477384 + ... + 2477387.

It is an arithmetic number, because the mean of its divisors is an integer number (3716079).

Almost surely, 2^9909542 is an apocalyptic number.

9909542 is a deficient number, since it is larger than the sum of its proper divisors (4954774).

9909542 is a wasteful number, since it uses less digits than its factorization.

9909542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954773.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 9909542 is about 3147.9425026515. The cubic root of 9909542 is about 214.7918808130.

The spelling of 9909542 in words is "nine million, nine hundred nine thousand, five hundred forty-two".