42839771 has 4 divisors (see below), whose sum is σ = 46135152. Its totient is φ = 39544392.

The previous prime is 42839729. The next prime is 42839773. The reversal of 42839771 is 17793824.

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 42839771 - 2⁶ = 42839707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42839773) 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, 1647671 + ... + 1647696.

It is an arithmetic number, because the mean of its divisors is an integer number (11533788).

Almost surely, 2^42839771 is an apocalyptic number.

42839771 is a deficient number, since it is larger than the sum of its proper divisors (3295381).

42839771 is a wasteful number, since it uses less digits than its factorization.

42839771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295380.

The product of its digits is 84672, while the sum is 41.

The square root of 42839771 is about 6545.2097750951. The cubic root of 42839771 is about 349.9041125082.

The spelling of 42839771 in words is "forty-two million, eight hundred thirty-nine thousand, seven hundred seventy-one".