820912 has 10 divisors (see below), whose sum is σ = 1590548. Its totient is φ = 410448.

The previous prime is 820909. The next prime is 820921. The reversal of 820912 is 219028.

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25638 + ... + 25669.

2⁸²⁰⁹¹² is an apocalyptic number.

It is an amenable number.

820912 is a deficient number, since it is larger than the sum of its proper divisors (769636).

820912 is a wasteful number, since it uses less digits than its factorization.

820912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51315 (or 51309 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 820912 is about 906.0419416341. The cubic root of 820912 is about 93.6337034980.

The spelling of 820912 in words is "eight hundred twenty thousand, nine hundred twelve".