820612 has 24 divisors (see below), whose sum is σ = 1586816. Its totient is φ = 368928.

The previous prime is 820609. The next prime is 820619. The reversal of 820612 is 216028.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 820612.

It is not an unprimeable number, because it can be changed into a prime (820619) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2053 + ... + 2419.

2⁸²⁰⁶¹² is an apocalyptic number.

It is an amenable number.

820612 is a deficient number, since it is larger than the sum of its proper divisors (766204).

820612 is a wasteful number, since it uses less digits than its factorization.

820612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 820612 is about 905.8763712560. The cubic root of 820612 is about 93.6222960497.

The spelling of 820612 in words is "eight hundred twenty thousand, six hundred twelve".