812348281 has 8 divisors (see below), whose sum is σ = 860383944. Its totient is φ = 764340480.

The previous prime is 812348279. The next prime is 812348323. The reversal of 812348281 is 182843218.

It can be written as a sum of positive squares in 4 ways, for example, as 1010025 + 811338256 = 1005^2 + 28484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812348281 - 2¹ = 812348279 is a prime.

It is a super-2 number, since 2×812348281² = 1319819459287309922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 812348281.

It is not an unprimeable number, because it can be changed into a prime (812348081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101071 + ... + 108811.

It is an arithmetic number, because the mean of its divisors is an integer number (107547993).

Almost surely, 2^812348281 is an apocalyptic number.

It is an amenable number.

812348281 is a deficient number, since it is larger than the sum of its proper divisors (48035663).

812348281 is a wasteful number, since it uses less digits than its factorization.

812348281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13931.

The product of its digits is 24576, while the sum is 37.

The square root of 812348281 is about 28501.7241759161. The cubic root of 812348281 is about 933.0697042697.

The spelling of 812348281 in words is "eight hundred twelve million, three hundred forty-eight thousand, two hundred eighty-one".