990245 has 8 divisors (see below), whose sum is σ = 1205016. Its totient is φ = 781056.

The previous prime is 990239. The next prime is 990259. The reversal of 990245 is 542099.

990245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 401956 + 588289 = 634^2 + 767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 990245 - 2⁶ = 990181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992 + ... + 1721.

It is an arithmetic number, because the mean of its divisors is an integer number (150627).

2⁹⁹⁰²⁴⁵ is an apocalyptic number.

It is an amenable number.

990245 is a deficient number, since it is larger than the sum of its proper divisors (214771).

990245 is a wasteful number, since it uses less digits than its factorization.

990245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 990245 is about 995.1105466228. The cubic root of 990245 is about 99.6737702320.

The spelling of 990245 in words is "nine hundred ninety thousand, two hundred forty-five".