812040271 has 4 divisors (see below), whose sum is σ = 928046032. Its totient is φ = 696034512.

The previous prime is 812040269. The next prime is 812040329. The reversal of 812040271 is 172040218.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 812040271 - 2¹ = 812040269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812044271) 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 3 ways as a sum of consecutive naturals, for example, 58002870 + ... + 58002883.

It is an arithmetic number, because the mean of its divisors is an integer number (232011508).

Almost surely, 2^812040271 is an apocalyptic number.

812040271 is a deficient number, since it is larger than the sum of its proper divisors (116005761).

812040271 is a wasteful number, since it uses less digits than its factorization.

812040271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116005760.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 812040271 is about 28496.3203063132. The cubic root of 812040271 is about 932.9517617826.

Adding to 812040271 its reverse (172040218), we get a palindrome (984080489).

The spelling of 812040271 in words is "eight hundred twelve million, forty thousand, two hundred seventy-one".