918842 has 4 divisors (see below), whose sum is σ = 1378266. Its totient is φ = 459420.

The previous prime is 918839. The next prime is 918857. The reversal of 918842 is 248819.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248819 = 61 ⋅4079.

It can be written as a sum of positive squares in only one way, i.e., 657721 + 261121 = 811^2 + 511^2 .

It is a junction number, because it is equal to n+sod(n) for n = 918799 and 918808.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 918842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 229709 + ... + 229712.

2⁹¹⁸⁸⁴² is an apocalyptic number.

918842 is a deficient number, since it is larger than the sum of its proper divisors (459424).

918842 is a wasteful number, since it uses less digits than its factorization.

918842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459423.

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

The square root of 918842 is about 958.5624653615. The cubic root of 918842 is about 97.2180590447.

The spelling of 918842 in words is "nine hundred eighteen thousand, eight hundred forty-two".