842274817 has 4 divisors (see below), whose sum is σ = 842484400. Its totient is φ = 842065236.

The previous prime is 842274761. The next prime is 842274821. The reversal of 842274817 is 718472248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842274817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842274217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98643 + ... + 106840.

It is an arithmetic number, because the mean of its divisors is an integer number (210621100).

Almost surely, 2^842274817 is an apocalyptic number.

It is an amenable number.

842274817 is a deficient number, since it is larger than the sum of its proper divisors (209583).

842274817 is a wasteful number, since it uses less digits than its factorization.

842274817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209582.

The product of its digits is 200704, while the sum is 43.

The square root of 842274817 is about 29021.9712803938. The cubic root of 842274817 is about 944.3897656890.

The spelling of 842274817 in words is "eight hundred forty-two million, two hundred seventy-four thousand, eight hundred seventeen".