818605042 has 8 divisors (see below), whose sum is σ = 1239173100. Its totient is φ = 405547344.

The previous prime is 818605027. The next prime is 818605091. The reversal of 818605042 is 240506818.

It can be written as a sum of positive squares in 2 ways, for example, as 800380681 + 18224361 = 28291^2 + 4269^2 .

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

It is a super-2 number, since 2×818605042² = 1340228429575643528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 818604989 and 818605007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1877317 + ... + 1877752.

Almost surely, 2^818605042 is an apocalyptic number.

818605042 is a deficient number, since it is larger than the sum of its proper divisors (420568058).

818605042 is a wasteful number, since it uses less digits than its factorization.

818605042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755180.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 818605042 is about 28611.2747356702. The cubic root of 818605042 is about 935.4591021305.

The spelling of 818605042 in words is "eight hundred eighteen million, six hundred five thousand, forty-two".