42008111 has 2 divisors, whose sum is σ = 42008112. Its totient is φ = 42008110.

The previous prime is 42008053. The next prime is 42008117. The reversal of 42008111 is 11180024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42008111 - 2¹⁸ = 41745967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42008111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42008117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21004055 + 21004056.

It is an arithmetic number, because the mean of its divisors is an integer number (21004056).

Almost surely, 2^42008111 is an apocalyptic number.

42008111 is a deficient number, since it is larger than the sum of its proper divisors (1).

42008111 is an equidigital number, since it uses as much as digits as its factorization.

42008111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 42008111 is about 6481.3664454342. The cubic root of 42008111 is about 347.6250392802.

Adding to 42008111 its reverse (11180024), we get a palindrome (53188135).

The spelling of 42008111 in words is "forty-two million, eight thousand, one hundred eleven".