42255571 has 2 divisors, whose sum is σ = 42255572. Its totient is φ = 42255570.

The previous prime is 42255569. The next prime is 42255589. The reversal of 42255571 is 17555224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42255571 - 2¹ = 42255569 is a prime.

Together with 42255569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42258571) 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, 21127785 + 21127786.

It is an arithmetic number, because the mean of its divisors is an integer number (21127786).

Almost surely, 2^42255571 is an apocalyptic number.

42255571 is a deficient number, since it is larger than the sum of its proper divisors (1).

42255571 is an equidigital number, since it uses as much as digits as its factorization.

42255571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14000, while the sum is 31.

The square root of 42255571 is about 6500.4285243359. The cubic root of 42255571 is about 348.3062960377.

The spelling of 42255571 in words is "forty-two million, two hundred fifty-five thousand, five hundred seventy-one".