42008771 has 4 divisors (see below), whose sum is σ = 48010032. Its totient is φ = 36007512.

The previous prime is 42008761. The next prime is 42008773. The reversal of 42008771 is 17780024.

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-42008771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42008773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000620 + ... + 3000633.

It is an arithmetic number, because the mean of its divisors is an integer number (12002508).

Almost surely, 2^42008771 is an apocalyptic number.

42008771 is a deficient number, since it is larger than the sum of its proper divisors (6001261).

42008771 is an equidigital number, since it uses as much as digits as its factorization.

42008771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001260.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 42008771 is about 6481.4173604236. The cubic root of 42008771 is about 347.6268598122.

Adding to 42008771 its reverse (17780024), we get a palindrome (59788795).

The spelling of 42008771 in words is "forty-two million, eight thousand, seven hundred seventy-one".