42511539 has 16 divisors (see below), whose sum is σ = 64982528. Its totient is φ = 24216192.

The previous prime is 42511537. The next prime is 42511589. The reversal of 42511539 is 93511524.

It is not a de Polignac number, because 42511539 - 2¹ = 42511537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42511537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4074 + ... + 10080.

It is an arithmetic number, because the mean of its divisors is an integer number (4061408).

Almost surely, 2^42511539 is an apocalyptic number.

42511539 is a deficient number, since it is larger than the sum of its proper divisors (22470989).

42511539 is a wasteful number, since it uses less digits than its factorization.

42511539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354.

The product of its digits is 5400, while the sum is 30.

The square root of 42511539 is about 6520.0873460407. The cubic root of 42511539 is about 349.0081825543.

The spelling of 42511539 in words is "forty-two million, five hundred eleven thousand, five hundred thirty-nine".