2100843 has 32 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 1254528.

The previous prime is 2100841. The next prime is 2100859. The reversal of 2100843 is 3480012.

It is a happy number.

It is not a de Polignac number, because 2100843 - 2¹ = 2100841 is a prime.

It is a super-3 number, since 3×2100843³ = 27816472103063331321, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2100841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10458 + ... + 10656.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2^2100843 is an apocalyptic number.

2100843 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2100843 is a deficient number, since it is larger than the sum of its proper divisors (1355157).

2100843 is a wasteful number, since it uses less digits than its factorization.

2100843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2100843 is about 1449.4285080679. The cubic root of 2100843 is about 128.0750495752.

Adding to 2100843 its reverse (3480012), we get a palindrome (5580855).

The spelling of 2100843 in words is "two million, one hundred thousand, eight hundred forty-three".