9447942 has 16 divisors (see below), whose sum is σ = 21595392. Its totient is φ = 2699400.

The previous prime is 9447887. The next prime is 9447943. The reversal of 9447942 is 2497449.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9447942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9447943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112434 + ... + 112517.

It is an arithmetic number, because the mean of its divisors is an integer number (1349712).

Almost surely, 2^9447942 is an apocalyptic number.

9447942 is an abundant number, since it is smaller than the sum of its proper divisors (12147450).

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

9447942 is a wasteful number, since it uses less digits than its factorization.

9447942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224963.

The product of its digits is 72576, while the sum is 39.

The square root of 9447942 is about 3073.7504778365. The cubic root of 9447942 is about 211.4036133971.

The spelling of 9447942 in words is "nine million, four hundred forty-seven thousand, nine hundred forty-two".