42005767 has 4 divisors (see below), whose sum is σ = 43141096. Its totient is φ = 40870440.

The previous prime is 42005749. The next prime is 42005779. The reversal of 42005767 is 76750024.

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 42005767 - 2²³ = 33617159 is a prime.

It is a super-2 number, since 2×42005767² = 3528968922516578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567609 + ... + 567682.

It is an arithmetic number, because the mean of its divisors is an integer number (10785274).

Almost surely, 2^42005767 is an apocalyptic number.

42005767 is a deficient number, since it is larger than the sum of its proper divisors (1135329).

42005767 is a wasteful number, since it uses less digits than its factorization.

42005767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135328.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 42005767 is about 6481.1856168451. The cubic root of 42005767 is about 347.6185734793.

The spelling of 42005767 in words is "forty-two million, five thousand, seven hundred sixty-seven".