42000771 has 4 divisors (see below), whose sum is σ = 56001032. Its totient is φ = 28000512.

The previous prime is 42000731. The next prime is 42000779. The reversal of 42000771 is 17700024.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-42000771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42000779) 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, 7000126 + ... + 7000131.

It is an arithmetic number, because the mean of its divisors is an integer number (14000258).

Almost surely, 2^42000771 is an apocalyptic number.

42000771 is a deficient number, since it is larger than the sum of its proper divisors (14000261).

42000771 is a wasteful number, since it uses less digits than its factorization.

42000771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14000260.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 42000771 is about 6480.8001820763. The cubic root of 42000771 is about 347.6047914729.

Adding to 42000771 its reverse (17700024), we get a palindrome (59700795).

The spelling of 42000771 in words is "forty-two million, seven hundred seventy-one", and thus it is an aban number.