2100043 has 4 divisors (see below), whose sum is σ = 2290968. Its totient is φ = 1909120.

The previous prime is 2100041. The next prime is 2100053. The reversal of 2100043 is 3400012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2100043 - 2¹ = 2100041 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95446 + ... + 95467.

It is an arithmetic number, because the mean of its divisors is an integer number (572742).

2^2100043 is an apocalyptic number.

2100043 is a deficient number, since it is larger than the sum of its proper divisors (190925).

2100043 is a wasteful number, since it uses less digits than its factorization.

2100043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190924.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2100043 is about 1449.1525109525. The cubic root of 2100043 is about 128.0587905389.

Adding to 2100043 its reverse (3400012), we get a palindrome (5500055).

The spelling of 2100043 in words is "two million, one hundred thousand, forty-three".