42111539 has 4 divisors (see below), whose sum is σ = 42370056. Its totient is φ = 41853024.

The previous prime is 42111529. The next prime is 42111541. The reversal of 42111539 is 93511124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42111539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42111529) 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, 129014 + ... + 129339.

It is an arithmetic number, because the mean of its divisors is an integer number (10592514).

Almost surely, 2^42111539 is an apocalyptic number.

42111539 is a deficient number, since it is larger than the sum of its proper divisors (258517).

42111539 is a wasteful number, since it uses less digits than its factorization.

42111539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258516.

The product of its digits is 1080, while the sum is 26.

The square root of 42111539 is about 6489.3404133240. The cubic root of 42111539 is about 347.9101008590.

The spelling of 42111539 in words is "forty-two million, one hundred eleven thousand, five hundred thirty-nine".