812146 has 4 divisors (see below), whose sum is σ = 1218222. Its totient is φ = 406072.

The previous prime is 812137. The next prime is 812167. The reversal of 812146 is 641218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641218 = 2 ⋅320609.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 114921 = 835^2 + 339^2 .

It is a super-2 number, since 2×812146² = 1319162250632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203035 + ... + 203038.

2⁸¹²¹⁴⁶ is an apocalyptic number.

812146 is a deficient number, since it is larger than the sum of its proper divisors (406076).

812146 is a wasteful number, since it uses less digits than its factorization.

812146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406075.

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

The square root of 812146 is about 901.1914336033. The cubic root of 812146 is about 93.2992250651.

The spelling of 812146 in words is "eight hundred twelve thousand, one hundred forty-six".