42011239 has 4 divisors (see below), whose sum is σ = 42066640. Its totient is φ = 41955840.

The previous prime is 42011213. The next prime is 42011251. The reversal of 42011239 is 93211024.

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-42011239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42011209) 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, 26547 + ... + 28084.

It is an arithmetic number, because the mean of its divisors is an integer number (10516660).

Almost surely, 2^42011239 is an apocalyptic number.

42011239 is a deficient number, since it is larger than the sum of its proper divisors (55401).

42011239 is an equidigital number, since it uses as much as digits as its factorization.

42011239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55400.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 42011239 is about 6481.6077480823. The cubic root of 42011239 is about 347.6336673293.

The spelling of 42011239 in words is "forty-two million, eleven thousand, two hundred thirty-nine".