42238871 has 2 divisors, whose sum is σ = 42238872. Its totient is φ = 42238870.

The previous prime is 42238841. The next prime is 42238883. The reversal of 42238871 is 17883224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42238871 - 2¹⁰ = 42237847 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 (42238811) 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, 21119435 + 21119436.

It is an arithmetic number, because the mean of its divisors is an integer number (21119436).

Almost surely, 2^42238871 is an apocalyptic number.

42238871 is a deficient number, since it is larger than the sum of its proper divisors (1).

42238871 is an equidigital number, since it uses as much as digits as its factorization.

42238871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 35.

The square root of 42238871 is about 6499.1438666951. The cubic root of 42238871 is about 348.2604047981.

It can be divided in two parts, 422 and 38871, that added together give a palindrome (39293).

The spelling of 42238871 in words is "forty-two million, two hundred thirty-eight thousand, eight hundred seventy-one".