42644111 has 2 divisors, whose sum is σ = 42644112. Its totient is φ = 42644110.

The previous prime is 42644071. The next prime is 42644137. The reversal of 42644111 is 11144624.

It is a happy number.

42644111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42644111 - 2¹⁸ = 42381967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42644411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21322055 + 21322056.

It is an arithmetic number, because the mean of its divisors is an integer number (21322056).

Almost surely, 2^42644111 is an apocalyptic number.

42644111 is a deficient number, since it is larger than the sum of its proper divisors (1).

42644111 is an equidigital number, since it uses as much as digits as its factorization.

42644111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

The square root of 42644111 is about 6530.2458606089. The cubic root of 42644111 is about 349.3705994477.

Adding to 42644111 its reverse (11144624), we get a palindrome (53788735).

The spelling of 42644111 in words is "forty-two million, six hundred forty-four thousand, one hundred eleven".