42771959 has 4 divisors (see below), whose sum is σ = 42795240. Its totient is φ = 42748680.

The previous prime is 42771947. The next prime is 42771977. The reversal of 42771959 is 95917724.

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-42771959 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 (42771359) 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, 8624 + ... + 12645.

It is an arithmetic number, because the mean of its divisors is an integer number (10698810).

Almost surely, 2^42771959 is an apocalyptic number.

42771959 is a deficient number, since it is larger than the sum of its proper divisors (23281).

42771959 is a wasteful number, since it uses less digits than its factorization.

42771959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23280.

The product of its digits is 158760, while the sum is 44.

The square root of 42771959 is about 6540.0274464256. The cubic root of 42771959 is about 349.7193914119.

The spelling of 42771959 in words is "forty-two million, seven hundred seventy-one thousand, nine hundred fifty-nine".