2011043 has 4 divisors (see below), whose sum is σ = 2014560. Its totient is φ = 2007528.

The previous prime is 2011033. The next prime is 2011057. The reversal of 2011043 is 3401102.

It is a happy number.

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 2011043 - 2⁴ = 2011027 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 (2011003) 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, 680 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (503640).

2^2011043 is an apocalyptic number.

2011043 is a deficient number, since it is larger than the sum of its proper divisors (3517).

2011043 is an equidigital number, since it uses as much as digits as its factorization.

2011043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2011043 is about 1418.1124779086. The cubic root of 2011043 is about 126.2235679724.

Adding to 2011043 its reverse (3401102), we get a palindrome (5412145).

The spelling of 2011043 in words is "two million, eleven thousand, forty-three".