42271237 has 2 divisors, whose sum is σ = 42271238. Its totient is φ = 42271236.

The previous prime is 42271223. The next prime is 42271247. The reversal of 42271237 is 73217224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36893476 + 5377761 = 6074^2 + 2319^2 .

It is a cyclic number.

It is not a de Polignac number, because 42271237 - 2¹¹ = 42269189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42271247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21135618 + 21135619.

It is an arithmetic number, because the mean of its divisors is an integer number (21135619).

Almost surely, 2^42271237 is an apocalyptic number.

It is an amenable number.

42271237 is a deficient number, since it is larger than the sum of its proper divisors (1).

42271237 is an equidigital number, since it uses as much as digits as its factorization.

42271237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 28.

The square root of 42271237 is about 6501.6334101516. The cubic root of 42271237 is about 348.3493348774.

The spelling of 42271237 in words is "forty-two million, two hundred seventy-one thousand, two hundred thirty-seven".