42011 has 4 divisors (see below), whose sum is σ = 43032. Its totient is φ = 40992.

The previous prime is 41999. The next prime is 42013. The reversal of 42011 is 11024.

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 42011 - 2⁶ = 41947 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 42011.

It is not an unprimeable number, because it can be changed into a prime (42013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446 + ... + 531.

It is an arithmetic number, because the mean of its divisors is an integer number (10758).

2⁴²⁰¹¹ is an apocalyptic number.

42011 is a deficient number, since it is larger than the sum of its proper divisors (1021).

42011 is an equidigital number, since it uses as much as digits as its factorization.

42011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 42011 is about 204.9658508142. The cubic root of 42011 is about 34.7633008104.

Adding to 42011 its reverse (11024), we get a palindrome (53035).

The spelling of 42011 in words is "forty-two thousand, eleven", and thus it is an iban number.