812955481 has 8 divisors (see below), whose sum is σ = 876048264. Its totient is φ = 749942400.

The previous prime is 812955469. The next prime is 812955497. The reversal of 812955481 is 184559218.

It can be written as a sum of positive squares in 4 ways, for example, as 21939856 + 791015625 = 4684^2 + 28125^2 .

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 812955481 - 2¹⁷ = 812824409 is a prime.

It is a super-2 number, since 2×812955481² = 1321793228175882722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812955581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2181 + ... + 40381.

It is an arithmetic number, because the mean of its divisors is an integer number (109506033).

Almost surely, 2^812955481 is an apocalyptic number.

It is an amenable number.

812955481 is a deficient number, since it is larger than the sum of its proper divisors (63092783).

812955481 is a wasteful number, since it uses less digits than its factorization.

812955481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39851.

The product of its digits is 115200, while the sum is 43.

The square root of 812955481 is about 28512.3741733304. The cubic root of 812955481 is about 933.3021246226.

The spelling of 812955481 in words is "eight hundred twelve million, nine hundred fifty-five thousand, four hundred eighty-one".