9821442 has 32 divisors (see below), whose sum is σ = 20905920. Its totient is φ = 3067200.

The previous prime is 9821429. The next prime is 9821443. The reversal of 9821442 is 2441289.

9821442 is nontrivially palindromic in base 7.

It is not an unprimeable number, because it can be changed into a prime (9821443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11088 + ... + 11940.

It is an arithmetic number, because the mean of its divisors is an integer number (653310).

Almost surely, 2^9821442 is an apocalyptic number.

9821442 is the 2559-th pentagonal number.

9821442 is an abundant number, since it is smaller than the sum of its proper divisors (11084478).

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

9821442 is a wasteful number, since it uses less digits than its factorization.

9821442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its digits is 4608, while the sum is 30.

The square root of 9821442 is about 3133.9179950981. The cubic root of 9821442 is about 214.1534550200.

The spelling of 9821442 in words is "nine million, eight hundred twenty-one thousand, four hundred forty-two".