811535042 has 8 divisors (see below), whose sum is σ = 1224339516. Its totient is φ = 403421872.

The previous prime is 811535027. The next prime is 811535047. The reversal of 811535042 is 240535118.

It can be written as a sum of positive squares in 2 ways, for example, as 734464201 + 77070841 = 27101^2 + 8779^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 811534996 and 811535014.

It is not an unprimeable number, because it can be changed into a prime (811535047) 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, 1172393 + ... + 1173084.

Almost surely, 2^811535042 is an apocalyptic number.

811535042 is a deficient number, since it is larger than the sum of its proper divisors (412804474).

811535042 is a wasteful number, since it uses less digits than its factorization.

811535042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345652.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 811535042 is about 28487.4541158033. The cubic root of 811535042 is about 932.7582360463.

The spelling of 811535042 in words is "eight hundred eleven million, five hundred thirty-five thousand, forty-two".