812104 has 8 divisors (see below), whose sum is σ = 1522710. Its totient is φ = 406048.

The previous prime is 812101. The next prime is 812129. The reversal of 812104 is 401218.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 487204 + 324900 = 698^2 + 570^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (812101) 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 as a sum of consecutive naturals, namely, 50749 + ... + 50764.

2⁸¹²¹⁰⁴ is an apocalyptic number.

It is an amenable number.

812104 is a deficient number, since it is larger than the sum of its proper divisors (710606).

812104 is a wasteful number, since it uses less digits than its factorization.

812104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101519 (or 101515 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 812104 is about 901.1681308169. The cubic root of 812104 is about 93.2976167193.

It can be divided in two parts, 812 and 104, that multiplied together give a palindrome (84448).

The spelling of 812104 in words is "eight hundred twelve thousand, one hundred four".