1018842 has 32 divisors (see below), whose sum is σ = 2280960. Its totient is φ = 300720.

The previous prime is 1018817. The next prime is 1018859. The reversal of 1018842 is 2488101.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 2659 + ... + 3017.

It is an arithmetic number, because the mean of its divisors is an integer number (71280).

2^1018842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1018842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1140480).

1018842 is an abundant number, since it is smaller than the sum of its proper divisors (1262118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1018842 is a wasteful number, since it uses less digits than its factorization.

1018842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 1018842 is about 1009.3770356017. The cubic root of 1018842 is about 100.6241627697.

The spelling of 1018842 in words is "one million, eighteen thousand, eight hundred forty-two".