981842 has 4 divisors (see below), whose sum is σ = 1472766. Its totient is φ = 490920.

The previous prime is 981823. The next prime is 981887. The reversal of 981842 is 248189.

It is a happy number.

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., 978121 + 3721 = 989^2 + 61^2 .

It is a junction number, because it is equal to n+sod(n) for n = 981799 and 981808.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245459 + ... + 245462.

2⁹⁸¹⁸⁴² is an apocalyptic number.

981842 is a deficient number, since it is larger than the sum of its proper divisors (490924).

981842 is a wasteful number, since it uses less digits than its factorization.

981842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490923.

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

The square root of 981842 is about 990.8794073953. The cubic root of 981842 is about 99.3910324462.

The spelling of 981842 in words is "nine hundred eighty-one thousand, eight hundred forty-two".