820250 has 32 divisors (see below), whose sum is σ = 1634256. Its totient is φ = 307200.

The previous prime is 820247. The next prime is 820271. The reversal of 820250 is 52028.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 29929 + 790321 = 173^2 + 889^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a zygodrome in base 3.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4154 + ... + 4346.

2⁸²⁰²⁵⁰ is an apocalyptic number.

820250 is a deficient number, since it is larger than the sum of its proper divisors (814006).

820250 is a wasteful number, since it uses less digits than its factorization.

820250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 820250 is about 905.6765427016. The cubic root of 820250 is about 93.6085273600.

Adding to 820250 its reverse (52028), we get a palindrome (872278).

The spelling of 820250 in words is "eight hundred twenty thousand, two hundred fifty".