42131671 has 2 divisors, whose sum is σ = 42131672. Its totient is φ = 42131670.

The previous prime is 42131669. The next prime is 42131681. The reversal of 42131671 is 17613124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42131671 - 2¹ = 42131669 is a prime.

Together with 42131669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42131681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065835 + 21065836.

It is an arithmetic number, because the mean of its divisors is an integer number (21065836).

Almost surely, 2^42131671 is an apocalyptic number.

42131671 is a deficient number, since it is larger than the sum of its proper divisors (1).

42131671 is an equidigital number, since it uses as much as digits as its factorization.

42131671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 42131671 is about 6490.8913871671. The cubic root of 42131671 is about 347.9655330950.

Adding to 42131671 its reverse (17613124), we get a palindrome (59744795).

The spelling of 42131671 in words is "forty-two million, one hundred thirty-one thousand, six hundred seventy-one".