842018 has 4 divisors (see below), whose sum is σ = 1263030. Its totient is φ = 421008.

The previous prime is 842003. The next prime is 842021. The reversal of 842018 is 810248.

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., 717409 + 124609 = 847^2 + 353^2 .

It is a junction number, because it is equal to n+sod(n) for n = 841984 and 842002.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842018.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210503 + ... + 210506.

2⁸⁴²⁰¹⁸ is an apocalyptic number.

842018 is a deficient number, since it is larger than the sum of its proper divisors (421012).

842018 is a wasteful number, since it uses less digits than its factorization.

842018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421011.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 842018 is about 917.6153878396. The cubic root of 842018 is about 94.4293771683.

The spelling of 842018 in words is "eight hundred forty-two thousand, eighteen".