812134281 has 24 divisors (see below), whose sum is σ = 1277394624. Its totient is φ = 457534560.

The previous prime is 812134259. The next prime is 812134307. The reversal of 812134281 is 182431218.

It is not a de Polignac number, because 812134281 - 2¹³ = 812126089 is a prime.

It is a super-2 number, since 2×812134281² = 1319124180750773922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812134481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28470 + ... + 49343.

It is an arithmetic number, because the mean of its divisors is an integer number (53224776).

Almost surely, 2^812134281 is an apocalyptic number.

It is an amenable number.

812134281 is a deficient number, since it is larger than the sum of its proper divisors (465260343).

812134281 is a wasteful number, since it uses less digits than its factorization.

812134281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77901 (or 77894 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 812134281 is about 28497.9697697924. The cubic root of 812134281 is about 932.9877630393.

Adding to 812134281 its reverse (182431218), we get a palindrome (994565499).

The spelling of 812134281 in words is "eight hundred twelve million, one hundred thirty-four thousand, two hundred eighty-one".