891842 has 8 divisors (see below), whose sum is σ = 1528896. Its totient is φ = 382212.

The previous prime is 891829. The next prime is 891851. The reversal of 891842 is 248198.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 891799 and 891808.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891842.

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 31838 + ... + 31865.

It is an arithmetic number, because the mean of its divisors is an integer number (191112).

2⁸⁹¹⁸⁴² is an apocalyptic number.

891842 is a deficient number, since it is larger than the sum of its proper divisors (637054).

891842 is a wasteful number, since it uses less digits than its factorization.

891842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63712.

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

The square root of 891842 is about 944.3738666439. The cubic root of 891842 is about 96.2563317362.

The spelling of 891842 in words is "eight hundred ninety-one thousand, eight hundred forty-two".