842918 has 4 divisors (see below), whose sum is σ = 1264380. Its totient is φ = 421458.

The previous prime is 842887. The next prime is 842923. The reversal of 842918 is 819248.

It is a happy number.

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

It is a super-3 number, since 3×842918³ = 1796706913051333896, which contains 333 as substring.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842918.

It is an unprimeable number.

842918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210728 + ... + 210731.

It is an arithmetic number, because the mean of its divisors is an integer number (316095).

2⁸⁴²⁹¹⁸ is an apocalyptic number.

842918 is a deficient number, since it is larger than the sum of its proper divisors (421462).

842918 is a wasteful number, since it uses less digits than its factorization.

842918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421461.

The product of its digits is 4608, while the sum is 32.

The square root of 842918 is about 918.1056584076. The cubic root of 842918 is about 94.4630091405.

The spelling of 842918 in words is "eight hundred forty-two thousand, nine hundred eighteen".