42104131 has 2 divisors, whose sum is σ = 42104132. Its totient is φ = 42104130.

The previous prime is 42104119. The next prime is 42104141. The reversal of 42104131 is 13140124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42104131 - 2⁷ = 42104003 is a prime.

It is a super-2 number, since 2×42104131² = 3545515694530322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42104141) 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, 21052065 + 21052066.

It is an arithmetic number, because the mean of its divisors is an integer number (21052066).

Almost surely, 2^42104131 is an apocalyptic number.

42104131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42104131 is an equidigital number, since it uses as much as digits as its factorization.

42104131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 42104131 is about 6488.7696060193. The cubic root of 42104131 is about 347.8896989356.

Adding to 42104131 its reverse (13140124), we get a palindrome (55244255).

The spelling of 42104131 in words is "forty-two million, one hundred four thousand, one hundred thirty-one".