999245 has 8 divisors (see below), whose sum is σ = 1291416. Its totient is φ = 737856.

The previous prime is 999239. The next prime is 999269. The reversal of 999245 is 542999.

It can be written as a sum of positive squares in 4 ways, for example, as 40804 + 958441 = 202^2 + 979^2 .

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 999245 - 2⁶ = 999181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999199 and 999208.

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, 7622 + ... + 7751.

It is an arithmetic number, because the mean of its divisors is an integer number (161427).

2⁹⁹⁹²⁴⁵ is an apocalyptic number.

It is an amenable number.

999245 is a deficient number, since it is larger than the sum of its proper divisors (292171).

999245 is a wasteful number, since it uses less digits than its factorization.

999245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15391.

The product of its digits is 29160, while the sum is 38.

The square root of 999245 is about 999.6224287200. The cubic root of 999245 is about 99.9748269971.

The spelling of 999245 in words is "nine hundred ninety-nine thousand, two hundred forty-five".