42534491 has 2 divisors, whose sum is σ = 42534492. Its totient is φ = 42534490.

The previous prime is 42534463. The next prime is 42534529. The reversal of 42534491 is 19443524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42534491 - 2¹⁰ = 42533467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42534451) 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, 21267245 + 21267246.

It is an arithmetic number, because the mean of its divisors is an integer number (21267246).

Almost surely, 2^42534491 is an apocalyptic number.

42534491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42534491 is an equidigital number, since it uses as much as digits as its factorization.

42534491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 42534491 is about 6521.8472076552. The cubic root of 42534491 is about 349.0709811483.

The spelling of 42534491 in words is "forty-two million, five hundred thirty-four thousand, four hundred ninety-one".