820412 has 6 divisors (see below), whose sum is σ = 1435728. Its totient is φ = 410204.

The previous prime is 820411. The next prime is 820427. The reversal of 820412 is 214028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102548 + ... + 102555.

It is an arithmetic number, because the mean of its divisors is an integer number (239288).

2⁸²⁰⁴¹² is an apocalyptic number.

It is an amenable number.

820412 is a deficient number, since it is larger than the sum of its proper divisors (615316).

820412 is a wasteful number, since it uses less digits than its factorization.

820412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205107 (or 205105 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 820412 is about 905.7659741898. The cubic root of 820412 is about 93.6146895395.

The spelling of 820412 in words is "eight hundred twenty thousand, four hundred twelve".