2081142 has 48 divisors (see below), whose sum is σ = 5241600. Its totient is φ = 584496.

The previous prime is 2081129. The next prime is 2081147. The reversal of 2081142 is 2411802.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081147) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 10359 + ... + 10557.

It is an arithmetic number, because the mean of its divisors is an integer number (109200).

2^2081142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2081142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2620800).

2081142 is an abundant number, since it is smaller than the sum of its proper divisors (3160458).

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

2081142 is a wasteful number, since it uses less digits than its factorization.

2081142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2081142 is about 1442.6163731221. The cubic root of 2081142 is about 127.6734433053.

Adding to 2081142 its reverse (2411802), we get a palindrome (4492944).

The spelling of 2081142 in words is "two million, eighty-one thousand, one hundred forty-two".