42011523 has 6 divisors (see below), whose sum is σ = 60683324. Its totient is φ = 28007676.

The previous prime is 42011521. The next prime is 42011549. The reversal of 42011523 is 32511024.

It is not a de Polignac number, because 42011523 - 2¹ = 42011521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42011496 and 42011505.

It is not an unprimeable number, because it can be changed into a prime (42011521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2333965 + ... + 2333982.

Almost surely, 2^42011523 is an apocalyptic number.

42011523 is a deficient number, since it is larger than the sum of its proper divisors (18671801).

42011523 is a wasteful number, since it uses less digits than its factorization.

42011523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667953 (or 4667950 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 42011523 is about 6481.6296561899. The cubic root of 42011523 is about 347.6344506732.

Adding to 42011523 its reverse (32511024), we get a palindrome (74522547).

The spelling of 42011523 in words is "forty-two million, eleven thousand, five hundred twenty-three".