42510887 has 2 divisors, whose sum is σ = 42510888. Its totient is φ = 42510886.

The previous prime is 42510869. The next prime is 42510907. The reversal of 42510887 is 78801524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42510887 - 2⁸ = 42510631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42515887) 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, 21255443 + 21255444.

It is an arithmetic number, because the mean of its divisors is an integer number (21255444).

Almost surely, 2^42510887 is an apocalyptic number.

42510887 is a deficient number, since it is larger than the sum of its proper divisors (1).

42510887 is an equidigital number, since it uses as much as digits as its factorization.

42510887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 42510887 is about 6520.0373465188. The cubic root of 42510887 is about 349.0063982976.

The spelling of 42510887 in words is "forty-two million, five hundred ten thousand, eight hundred eighty-seven".