42228587 has 2 divisors, whose sum is σ = 42228588. Its totient is φ = 42228586.

The previous prime is 42228577. The next prime is 42228679. The reversal of 42228587 is 78582224.

It is a happy number.

42228587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42228587 - 2⁶ = 42228523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42228587.

It is not a weakly prime, because it can be changed into another prime (42228547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21114293 + 21114294.

It is an arithmetic number, because the mean of its divisors is an integer number (21114294).

Almost surely, 2^42228587 is an apocalyptic number.

42228587 is a deficient number, since it is larger than the sum of its proper divisors (1).

42228587 is an equidigital number, since it uses as much as digits as its factorization.

42228587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71680, while the sum is 38.

The square root of 42228587 is about 6498.3526373997. The cubic root of 42228587 is about 348.2321385698.

The spelling of 42228587 in words is "forty-two million, two hundred twenty-eight thousand, five hundred eighty-seven".