812412001 has 4 divisors (see below), whose sum is σ = 813080772. Its totient is φ = 811743232.

The previous prime is 812411881. The next prime is 812412019. The reversal of 812412001 is 100214218.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 634989601 + 177422400 = 25199^2 + 13320^2 .

It is a cyclic number.

It is not a de Polignac number, because 812412001 - 2¹¹ = 812409953 is a prime.

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 812412001.

It is not an unprimeable number, because it can be changed into a prime (812412101) 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, 332560 + ... + 334993.

It is an arithmetic number, because the mean of its divisors is an integer number (203270193).

Almost surely, 2^812412001 is an apocalyptic number.

It is an amenable number.

812412001 is a deficient number, since it is larger than the sum of its proper divisors (668771).

812412001 is a wasteful number, since it uses less digits than its factorization.

812412001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668770.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 812412001 is about 28502.8419811078. The cubic root of 812412001 is about 933.0941000650.

Adding to 812412001 its reverse (100214218), we get a palindrome (912626219).

The spelling of 812412001 in words is "eight hundred twelve million, four hundred twelve thousand, one".