817115042 has 8 divisors (see below), whose sum is σ = 1227423132. Its totient is φ = 407974000.

The previous prime is 817115029. The next prime is 817115053. The reversal of 817115042 is 240511718.

It can be written as a sum of positive squares in 2 ways, for example, as 800946601 + 16168441 = 28301^2 + 4021^2 .

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 = 817114996 and 817115014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290009 + ... + 292812.

Almost surely, 2^817115042 is an apocalyptic number.

817115042 is a deficient number, since it is larger than the sum of its proper divisors (410308090).

817115042 is a wasteful number, since it uses less digits than its factorization.

817115042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583524.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 817115042 is about 28585.2241901301. The cubic root of 817115042 is about 934.8911926917.

The spelling of 817115042 in words is "eight hundred seventeen million, one hundred fifteen thousand, forty-two".