2101842 has 16 divisors (see below), whose sum is σ = 4670880. Its totient is φ = 700596.

The previous prime is 2101823. The next prime is 2101843. The reversal of 2101842 is 2481012.

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

It is not an unprimeable number, because it can be changed into a prime (2101843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19408 + ... + 19515.

It is an arithmetic number, because the mean of its divisors is an integer number (291930).

2^2101842 is an apocalyptic number.

2101842 is an abundant number, since it is smaller than the sum of its proper divisors (2569038).

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

2101842 is a wasteful number, since it uses less digits than its factorization.

2101842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38934 (or 38928 counting only the distinct ones).

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

The square root of 2101842 is about 1449.7730856931. The cubic root of 2101842 is about 128.0953472524.

Adding to 2101842 its reverse (2481012), we get a palindrome (4582854).

The spelling of 2101842 in words is "two million, one hundred one thousand, eight hundred forty-two".