42417887 has 2 divisors, whose sum is σ = 42417888. Its totient is φ = 42417886.

The previous prime is 42417871. The next prime is 42417919. The reversal of 42417887 is 78871424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42417887 - 2⁴ = 42417871 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 (42417847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21208943 + 21208944.

It is an arithmetic number, because the mean of its divisors is an integer number (21208944).

Almost surely, 2^42417887 is an apocalyptic number.

42417887 is a deficient number, since it is larger than the sum of its proper divisors (1).

42417887 is an equidigital number, since it uses as much as digits as its factorization.

42417887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 41.

The square root of 42417887 is about 6512.9015807089. The cubic root of 42417887 is about 348.7517083030.

The spelling of 42417887 in words is "forty-two million, four hundred seventeen thousand, eight hundred eighty-seven".