842416857 has 6 divisors (see below), whose sum is σ = 1216824362. Its totient is φ = 561611232.

The previous prime is 842416831. The next prime is 842416871. The reversal of 842416857 is 758614248.

It can be written as a sum of positive squares in only one way, i.e., 841928256 + 488601 = 29016^2 + 699^2 .

It is not a de Polignac number, because 842416857 - 2¹⁵ = 842384089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842416807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46800928 + ... + 46800945.

Almost surely, 2^842416857 is an apocalyptic number.

It is an amenable number.

842416857 is a deficient number, since it is larger than the sum of its proper divisors (374407505).

842416857 is a wasteful number, since it uses less digits than its factorization.

842416857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93601879 (or 93601876 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 842416857 is about 29024.4182887444. The cubic root of 842416857 is about 944.4428495439.

It can be divided in two parts, 8424 and 16857, that added together give a square (25281 = 159²).

The spelling of 842416857 in words is "eight hundred forty-two million, four hundred sixteen thousand, eight hundred fifty-seven".