42434591 has 2 divisors, whose sum is σ = 42434592. Its totient is φ = 42434590.

The previous prime is 42434537. The next prime is 42434599. The reversal of 42434591 is 19543424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42434591 - 2¹⁸ = 42172447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42434599) 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, 21217295 + 21217296.

It is an arithmetic number, because the mean of its divisors is an integer number (21217296).

Almost surely, 2^42434591 is an apocalyptic number.

42434591 is a deficient number, since it is larger than the sum of its proper divisors (1).

42434591 is an equidigital number, since it uses as much as digits as its factorization.

42434591 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 42434591 is about 6514.1838322233. The cubic root of 42434591 is about 348.7974813202.

The spelling of 42434591 in words is "forty-two million, four hundred thirty-four thousand, five hundred ninety-one".