42101803 has 2 divisors, whose sum is σ = 42101804. Its totient is φ = 42101802.

The previous prime is 42101797. The next prime is 42101821. The reversal of 42101803 is 30810124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42101803 - 2²¹ = 40004651 is a prime.

It is not a weakly prime, because it can be changed into another prime (42101203) 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, 21050901 + 21050902.

It is an arithmetic number, because the mean of its divisors is an integer number (21050902).

Almost surely, 2^42101803 is an apocalyptic number.

42101803 is a deficient number, since it is larger than the sum of its proper divisors (1).

42101803 is an equidigital number, since it uses as much as digits as its factorization.

42101803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 42101803 is about 6488.5902166804. The cubic root of 42101803 is about 347.8832870379.

Adding to 42101803 its reverse (30810124), we get a palindrome (72911927).

The spelling of 42101803 in words is "forty-two million, one hundred one thousand, eight hundred three".