812077 has 6 divisors (see below), whose sum is σ = 944718. Its totient is φ = 696024.

The previous prime is 812057. The next prime is 812081. The reversal of 812077 is 770218.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 741321 + 70756 = 861^2 + 266^2 .

It is not a de Polignac number, because 812077 - 2¹⁹ = 287789 is a prime.

It is a Duffinian number.

812077 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8238 + ... + 8335.

It is an arithmetic number, because the mean of its divisors is an integer number (157453).

2⁸¹²⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

812077 is a deficient number, since it is larger than the sum of its proper divisors (132641).

812077 is a wasteful number, since it uses less digits than its factorization.

812077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16587 (or 16580 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 812077 is about 901.1531501360. The cubic root of 812077 is about 93.2965827534.

The spelling of 812077 in words is "eight hundred twelve thousand, seventy-seven".