42191011 has 2 divisors, whose sum is σ = 42191012. Its totient is φ = 42191010.

The previous prime is 42190999. The next prime is 42191053. The reversal of 42191011 is 11019124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42191011 - 2⁵ = 42190979 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42191011.

It is not a weakly prime, because it can be changed into another prime (42191711) 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 as a sum of consecutive naturals, namely, 21095505 + 21095506.

It is an arithmetic number, because the mean of its divisors is an integer number (21095506).

Almost surely, 2^42191011 is an apocalyptic number.

42191011 is a deficient number, since it is larger than the sum of its proper divisors (1).

42191011 is an equidigital number, since it uses as much as digits as its factorization.

42191011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 42191011 is about 6495.4607996662. The cubic root of 42191011 is about 348.1288195084.

The spelling of 42191011 in words is "forty-two million, one hundred ninety-one thousand, eleven".