42906187 has 2 divisors, whose sum is σ = 42906188. Its totient is φ = 42906186.

The previous prime is 42906179. The next prime is 42906209. The reversal of 42906187 is 78160924.

42906187 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 42906187 - 2³ = 42906179 is a prime.

It is not a weakly prime, because it can be changed into another prime (42906137) 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, 21453093 + 21453094.

It is an arithmetic number, because the mean of its divisors is an integer number (21453094).

Almost surely, 2^42906187 is an apocalyptic number.

42906187 is a deficient number, since it is larger than the sum of its proper divisors (1).

42906187 is an equidigital number, since it uses as much as digits as its factorization.

42906187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 42906187 is about 6550.2814443350. The cubic root of 42906187 is about 350.0848420172.

The spelling of 42906187 in words is "forty-two million, nine hundred six thousand, one hundred eighty-seven".