997285 has 4 divisors (see below), whose sum is σ = 1196748. Its totient is φ = 797824.

The previous prime is 997279. The next prime is 997307. The reversal of 997285 is 582799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582799 = 7 ⋅83257.

It can be written as a sum of positive squares in 2 ways, for example, as 261121 + 736164 = 511^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 997285 - 2¹¹ = 995237 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99724 + ... + 99733.

It is an arithmetic number, because the mean of its divisors is an integer number (299187).

2⁹⁹⁷²⁸⁵ is an apocalyptic number.

It is an amenable number.

997285 is a deficient number, since it is larger than the sum of its proper divisors (199463).

997285 is a wasteful number, since it uses less digits than its factorization.

997285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199462.

The product of its digits is 45360, while the sum is 40.

The square root of 997285 is about 998.6415773439. The cubic root of 997285 is about 99.9094179737.

The spelling of 997285 in words is "nine hundred ninety-seven thousand, two hundred eighty-five".