42011023 has 4 divisors (see below), whose sum is σ = 42231168. Its totient is φ = 41790880.

The previous prime is 42011017. The next prime is 42011083. The reversal of 42011023 is 32011024.

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 42011023 - 2⁹ = 42010511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42010994 and 42011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42011083) 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, 109786 + ... + 110167.

It is an arithmetic number, because the mean of its divisors is an integer number (10557792).

Almost surely, 2^42011023 is an apocalyptic number.

42011023 is a deficient number, since it is larger than the sum of its proper divisors (220145).

42011023 is a wasteful number, since it uses less digits than its factorization.

42011023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220144.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 42011023 is about 6481.5910855283. The cubic root of 42011023 is about 347.6330715443.

Adding to 42011023 its reverse (32011024), we get a palindrome (74022047).

Subtracting from 42011023 its reverse (32011024), we obtain a palindrome (9999999).

The spelling of 42011023 in words is "forty-two million, eleven thousand, twenty-three".