805617122 has 4 divisors (see below), whose sum is σ = 1208425686. Its totient is φ = 402808560.

The previous prime is 805617121. The next prime is 805617149. The reversal of 805617122 is 221716508.

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

It can be written as a sum of positive squares in only one way, i.e., 724094281 + 81522841 = 26909^2 + 9029^2 .

It is not an unprimeable number, because it can be changed into a prime (805617121) 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 as a sum of consecutive naturals, namely, 201404279 + ... + 201404282.

Almost surely, 2^805617122 is an apocalyptic number.

805617122 is a deficient number, since it is larger than the sum of its proper divisors (402808564).

805617122 is a wasteful number, since it uses less digits than its factorization.

805617122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402808563.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 805617122 is about 28383.3951809857. The cubic root of 805617122 is about 930.4853989008.

The spelling of 805617122 in words is "eight hundred five million, six hundred seventeen thousand, one hundred twenty-two".