42187877 has 2 divisors, whose sum is σ = 42187878. Its totient is φ = 42187876.

The previous prime is 42187843. The next prime is 42187907. The reversal of 42187877 is 77878124.

42187877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40627876 + 1560001 = 6374^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 42187877 - 2⁶ = 42187813 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 (42187177) 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, 21093938 + 21093939.

It is an arithmetic number, because the mean of its divisors is an integer number (21093939).

Almost surely, 2^42187877 is an apocalyptic number.

It is an amenable number.

42187877 is a deficient number, since it is larger than the sum of its proper divisors (1).

42187877 is an equidigital number, since it uses as much as digits as its factorization.

42187877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 175616, while the sum is 44.

The square root of 42187877 is about 6495.2195497920. The cubic root of 42187877 is about 348.1201994832.

The spelling of 42187877 in words is "forty-two million, one hundred eighty-seven thousand, eight hundred seventy-seven".