42751111 has 4 divisors (see below), whose sum is σ = 46039672. Its totient is φ = 39462552.

The previous prime is 42751109. The next prime is 42751117. The reversal of 42751111 is 11115724.

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 42751111 - 2¹ = 42751109 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 (42751117) 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, 1644261 + ... + 1644286.

It is an arithmetic number, because the mean of its divisors is an integer number (11509918).

Almost surely, 2^42751111 is an apocalyptic number.

42751111 is a deficient number, since it is larger than the sum of its proper divisors (3288561).

42751111 is a wasteful number, since it uses less digits than its factorization.

42751111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288560.

The product of its digits is 280, while the sum is 22.

The square root of 42751111 is about 6538.4333750525. The cubic root of 42751111 is about 349.6625618522.

Adding to 42751111 its reverse (11115724), we get a palindrome (53866835).

The spelling of 42751111 in words is "forty-two million, seven hundred fifty-one thousand, one hundred eleven".