990242 has 32 divisors (see below), whose sum is σ = 1797120. Its totient is φ = 403920.

The previous prime is 990239. The next prime is 990259. The reversal of 990242 is 242099.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9563 + ... + 9665.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2⁹⁹⁰²⁴² is an apocalyptic number.

990242 is a deficient number, since it is larger than the sum of its proper divisors (806878).

990242 is a wasteful number, since it uses less digits than its factorization.

990242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 990242 is about 995.1090392515. The cubic root of 990242 is about 99.6736695763.

The spelling of 990242 in words is "nine hundred ninety thousand, two hundred forty-two".