9998242 has 4 divisors (see below), whose sum is σ = 14997366. Its totient is φ = 4999120.

The previous prime is 9998239. The next prime is 9998249. The reversal of 9998242 is 2428999.

It is a happy number.

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., 7834401 + 2163841 = 2799^2 + 1471^2 .

It is not an unprimeable number, because it can be changed into a prime (9998249) 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 as a sum of consecutive naturals, namely, 2499559 + ... + 2499562.

Almost surely, 2^9998242 is an apocalyptic number.

9998242 is a deficient number, since it is larger than the sum of its proper divisors (4999124).

9998242 is a wasteful number, since it uses less digits than its factorization.

9998242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999123.

The product of its digits is 93312, while the sum is 43.

The square root of 9998242 is about 3161.9996837444. Note that the first 3 decimals coincide. The cubic root of 9998242 is about 215.4308432760.

The spelling of 9998242 in words is "nine million, nine hundred ninety-eight thousand, two hundred forty-two".