42905111 has 2 divisors, whose sum is σ = 42905112. Its totient is φ = 42905110.

The previous prime is 42905081. The next prime is 42905113. The reversal of 42905111 is 11150924.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42905111 - 2¹⁸ = 42642967 is a prime.

It is a Sophie Germain prime.

Together with 42905113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42905113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21452555 + 21452556.

It is an arithmetic number, because the mean of its divisors is an integer number (21452556).

Almost surely, 2^42905111 is an apocalyptic number.

42905111 is a deficient number, since it is larger than the sum of its proper divisors (1).

42905111 is an equidigital number, since it uses as much as digits as its factorization.

42905111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 42905111 is about 6550.1993099447. The cubic root of 42905111 is about 350.0819155205.

The spelling of 42905111 in words is "forty-two million, nine hundred five thousand, one hundred eleven".