812164 has 12 divisors (see below), whose sum is σ = 1428364. Its totient is φ = 404064.

The previous prime is 812137. The next prime is 812167. The reversal of 812164 is 461218.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 293764 = 720^2 + 542^2 .

It is a super-2 number, since 2×812164² = 1319220725792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812167) 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 3 ways as a sum of consecutive naturals, for example, 742 + ... + 1474.

2⁸¹²¹⁶⁴ is an apocalyptic number.

It is an amenable number.

812164 is a deficient number, since it is larger than the sum of its proper divisors (616200).

812164 is a wasteful number, since it uses less digits than its factorization.

812164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014 (or 1012 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 812164 is about 901.2014203273. The cubic root of 812164 is about 93.2999143393.

The spelling of 812164 in words is "eight hundred twelve thousand, one hundred sixty-four".