42140111 has 4 divisors (see below), whose sum is σ = 45381672. Its totient is φ = 38898552.

The previous prime is 42140107. The next prime is 42140123. The reversal of 42140111 is 11104124.

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 42140111 - 2² = 42140107 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 (42140411) 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, 1620761 + ... + 1620786.

It is an arithmetic number, because the mean of its divisors is an integer number (11345418).

Almost surely, 2^42140111 is an apocalyptic number.

42140111 is a deficient number, since it is larger than the sum of its proper divisors (3241561).

42140111 is a wasteful number, since it uses less digits than its factorization.

42140111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241560.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 42140111 is about 6491.5414964398. The cubic root of 42140111 is about 347.9887668678.

Adding to 42140111 its reverse (11104124), we get a palindrome (53244235).

The spelling of 42140111 in words is "forty-two million, one hundred forty thousand, one hundred eleven".