42534091 has 2 divisors, whose sum is σ = 42534092. Its totient is φ = 42534090.

The previous prime is 42534071. The next prime is 42534131. The reversal of 42534091 is 19043524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42534091 - 2⁵ = 42534059 is a prime.

It is equal to p_2578141 and since 42534091 and 2578141 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42534001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21267045 + 21267046.

It is an arithmetic number, because the mean of its divisors is an integer number (21267046).

Almost surely, 2^42534091 is an apocalyptic number.

42534091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42534091 is an equidigital number, since it uses as much as digits as its factorization.

42534091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 42534091 is about 6521.8165414246. The cubic root of 42534091 is about 349.0698869082.

The spelling of 42534091 in words is "forty-two million, five hundred thirty-four thousand, ninety-one".